| 释义 |
heat
heat H0111900 (hēt)n.1. Physics a. A form of energy associated with the kinetic energy of atoms or molecules and capable of being transmitted through solid and fluid media by conduction, through fluid media by convection, and through empty space by radiation.b. The transfer of energy from one body to another as a result of a difference in temperature or a change in phase.2. The sensation or perception of such energy as warmth or hotness.3. An abnormally high bodily temperature, as from a fever.4. a. The condition of being hot.b. A degree of warmth or hotness: The burner was on low heat.5. a. The warming of a room or building by a furnace or another source of energy: The house was cheap to rent, but the heat was expensive.b. A furnace or other source of warmth in a room or building: The heat was on when we returned from work.6. A hot season; a spell of hot weather.7. a. Intensity, as of passion, emotion, color, appearance, or effect.b. The most intense or active stage: the heat of battle.c. A burning sensation in the mouth produced by spicy flavoring in food.8. Estrus.9. One of a series of efforts or attempts.10. a. Sports & Games One round of several in a competition, such as a race.b. A preliminary contest held to determine finalists.11. Informal Pressure; stress.12. Slang a. An intensification of police activity in pursuing criminals.b. The police. Used with the.13. Slang Adverse comments or hostile criticism: Heat from the press forced the senator to resign.14. Slang A firearm, especially a pistol.v. heat·ed, heat·ing, heats v.tr.1. To make warm or hot.2. To excite the feelings of; inflame.3. Physics To increase the heat energy of (an object).v.intr.1. To become warm or hot.2. To become excited emotionally or intellectually.Phrasal Verb: heat up Informal To become acute or intense: "If inflation heats up, interest rates could increase" (Christian Science Monitor).
[Middle English hete, from Old English hǣtu; see kai- in Indo-European roots.]heat (hiːt) n1. (General Physics) a. the energy transferred as a result of a difference in temperatureb. the random kinetic energy of the atoms, molecules, or ions in a substance or body2. (Physiology) the sensation caused in the body by heat energy; warmth3. the state or quality of being hot4. hot weather: the heat of summer. 5. intensity of feeling; passion: the heat of rage. 6. pressure: the political heat on the government over the economy. 7. the most intense or active part: the heat of the battle. 8. (Zoology) a period or condition of sexual excitement in female mammals that occurs at oestrus9. (Individual Sports, other than specified) sport a. a preliminary eliminating contest in a competitionb. a single section of a contest10. slang police activity after a crime: the heat is off. 11. chiefly slang US criticism or abuse: he took a lot of heat for that mistake. 12. in the heat of the moment without pausing to think13. (Zoology) on heat in heat a. Also: in season (of some female mammals) sexually receptiveb. in a state of sexual excitement14. the heat slang the police15. turn up the heat turn on the heat informal to increase the intensity of activity, coercion, etcvb16. to make or become hot or warm17. to make or become excited or intense[Old English hǣtu; related to hāt hot, Old Frisian hēte heat, Old High German heizī] ˈheatless adjheat (hit)
n. 1. the condition or quality of being hot; the state of a body having or generating a high degree of warmth. 2. degree of hotness; temperature: moderate heat. 3. the sensation of warmth or hotness. 4. a bodily temperature higher than normal. 5. a source of heat, as a stove burner or furnace. 6. added or external energy that causes a rise in temperature, expansion, or other physical change. 7. Physics. a nonmechanical energy transfer between regions of different temperature, as between a system and its surroundings or between two parts of the same system. Symbol: Q 8. hot weather or climate. 9. a period of hot weather. 10. sharp, pungent flavor; spiciness. 11. warmth or intensity of feeling; vehemence; passion. 12. maximum intensity in an activity or condition; height: the heat of battle; the heat of passion. 13. tension or strain, as from the pressure of events: in the heat of a hasty departure. 14. Slang. a. pursuit or investigation by the police. b. intensified or coercive pressure: to put the heat on someone. c. censure; blame; hostile response. d. the police. e. a firearm; gun. 15. a single intense effort or operation: The painting was finished at a heat. 16. a. a single course in or division of a race or other contest. b. a race or other contest in which competitors attempt to qualify for entry in the final race or contest. 17. a. a single operation of heating, as of metal in a furnace, in the treating and melting of metals. b. a quantity of metal produced by such an operation. 18. a. sexual receptiveness in animals, esp. females. b. the period or duration of such receptiveness: to be in heat. 19. an indication of high temperature, as by the color or condition of something. v.t. 20. to make hot or warm (often fol. by up). 21. to excite emotionally; inflame; rouse. v.i. 22. to become hot or warm (often fol. by up). 23. to become excited emotionally. 24. heat up, to increase or become more active or intense. [before 900; Middle English hete, Old English hǣtu, c. Old Frisian, Middle Dutch hēte, Old High German heizī; n. derivative from base of hot] heat′a•ble, adj. heat (hēt) A form of energy produced by the motion of molecules. The heat of a substance is the total energy produced by the motion of its molecules. See Note at temperature. See estrus.heat - As a preliminary race for a sporting contest, it is so called because of its intensity.See also related terms for intensity.HeatSee also cold; fire
actinismthe ability of light and heat and other forms of radiant energy to cause chemical changes, as hormonal changes in birds causing them to migrate or brood. — actinic, adj.adiathermancyimperviousness to radiant heat or infrared radiation. Also called athermancy.athermancyadiathermancy.calorimetrythe science of measuring heat. — calorimeter, n. — calorimetric, adj.caloristRare. one who believed the caloric theory, that heat is a material substance. — caloristic, adj.galvanothermythe process of generating heat by means of an electric current.geothermometrythe branch of geology that measures temperatures deep below the surface of the earth; geologic thermometry.pyrogenesisthe production or generation of heat. — pyrogenetic, adj.pyrolysisthe chemical process of decomposition under the effect of heat. — pyrolitic, adj.pyrophotometera type of pyrometer that measures temperature optically or photometrically.tepiditya moderate warmth; lukewarmness. — tepid, adj.thermatologyMedicine. the study of heat as a medical remedy or therapy. Also called thermotherapy.thermionicsthe science or study of the emission of electrons from substances at high temperatures. — thermionic, adj.thermochemistrythe branch of chemistry that studies the relationship of heat to chemical changes, including the production of energy. — thermochemist, n. — thermochemical, adj.thermodynamicsthe branch of physics that studies the relationship of heat and mechanical energy and the conversion, in various materials, of one into the other. — thermodynamicist, n. — thermodynamic, thermodynamical, adj.thermogenesis, thermogenythe production of heat, especially in an animal body by physiological processes. — thermogenic, thermogenous, adj.thermography1. Engineering, a method of measuring surf ace temperatures by using luminescent materials.
2. a printing or photocopying process using infrared rays and heat.
3. a process of photography using far-infrared radiation; thermal photography. — thermographer, n. — thermographic, adj.thermokinematicsthe study of the movement of heat. — thermokinematic, adj.thermologyArchaic. the science and study of heat. Also called thermotics.thermoluminescenceAtomic Physics. any luminescence appearing in materials upon application of heat, caused by electron movement which increases as the temperature rises. — thermoluminescent, adj.thermolysisPhysiology. the dispersion of heat from the body. — thermolytic, adj.thermometrythe branch of physics that deals with the measurement of temperature. — thermometric, adj.thermophobiaan abnormal fear of heat.thermoscopea device for giving an approximation of the temperature change of a substance by noting the accompanying change in its volume. — thermoscopic, adj.thermostaticsthe science or study of the equilibrium of heat.thermotaxis1. Biology. the movement of an organism toward or away from a source of heat.
2. Physiology. the regulation of body temperature by various physiological processes. — thermotactic, thermotaxic, adj.thermotherapythermatology.thermoticsthermology.transcalencythe property or quality by which matter permits the passage of heat. — transcalent, adj.Heat See Also: WEATHER - The days were like hot coals —Henry Wadsworth Longfellow
See Also: DAY - A glaring, summery heat covered everything like a layer of glass —Jean Thompson
- The heat came down on you like a leaden mantle, stifling you as it did so —Dominique Lapierre
- [Midsummer] heat closed in like a hand over a murder victim’s mouth —Truman Capote
- Heat fell on her like a blanket —Julia O’Faolain
- Heat gathers like fog —Angela Carter
- Heat … heavy as water —Dan Jacobson
- The heat … hung like a hot dust vapor —H. E. Bates
- Heat lay on the pavement like a tired dog in the doorway of a house —Aharon Megged
See Also: CITY/STREETSCAPES - Heat shimmered and bent the fields like the landscape was a reflection in an old mirror —Will Weaver
See Also: LANDSCAPES - The heat thick as a swamp —Margaret Atwood
- Heat thick as jelly —Elizabeth Enright
- The heat was like a tyrant who hated his subjects —William H. Hallhan
- The heat was like a wasting disease —T. Coraghessan Boyle
- Heat waves … rising … like fumes off kerosene —Larry McMurtry
- Heat waves rose writhing like fine wavy hair —Wallace Stegner
- (Sun) hot as a blast furnace —Raymond Chandler
- Hot as a blister —Sir Francis C. Burnand
- Hot as a draft from hell —William H. Gass
- Hot as a four-alarm fire —H. C. Witwer
- Hot as a fox —Elizabeth Spencer
- Hot as a jungle —T. Coraghessan Boyle
- Hot as a mink in Africa —Reynolds Price
- Hot as an oven —The Holy Bible
Writers and speakers have long repeated and enlarged upon this simile, changing the descriptive frame of reference altogether or switching from the oven to what comes out of it. Some of these old-timers include: “Hot as hell-fire” (John Dryden), “Hot as hate” (Hamlin Garland), “Hot as hammered hell/hot as hammered lightning” (American colloquialisms) and “Hot as a basted turkey” (Will Carleton). - (On some nights, New York is as) hot as Bangkok —Saul Bellow
- Hot as live ash —Beryl Markham
- (I am as) hot as molten lead, and as heavy too —William Shakespeare
- (I’m) hot as shit —Richard Ford
- (Even the fog that day was) hot as soup —Marge Piercy
- Hot as the business end of a pistol —Delmore Schwartz
- Hot as the hinges of hell —Babs H. Deal
- The hot days pressed people flat as irons —Susan Fromberg Schaeffer
- Hot, like a furnace room —Frank Conroy
- It was like being inside a radiator —David Brierley
- It was more than hot: it was like being under a damp blanket in the tropics —Laurie Colwin
- Scorches like nettles —Babette Deutsch
- Steaming [from hot weather] like crabs in a soup pot —Margaret Laurence
- (The shallow ditches were) steaming like fresh cowflap —Paul Theroux
- [A hot bath] steams like a bowl of soup —Margaret Atwood
- (She was) trapped between the heat of the sun and the heat rising from the earth. It was like being struck simultaneously by gusts of fire from above and from below —Margaret Millar
- Warm as a newborn child —William Alfred
- Warm as summer —Walter Savage Landor
- Warm as veins —Ted Hughes
- (The water is) warm like my blood —Marge Piercy
- (A novel that) warms like a hug —Anon book blurb, quoted in advertisement from San Francisco Chronicle
heatIn informal English, if you want to emphasize how hot the weather is, you can say that it is boiling or scorching. 'It's boiling in here,' complained Miriam.That race was run in scorching weather.In winter, if the temperature is above average, you say that it is mild. In general, hot suggests a higher temperature than warm, and warm things are usually pleasant. The area is famous for its mild climate.It was too hot even for a gentle stroll....a warm evening.heat
Past participle: heated
Gerund: heating
| Present |
|---|
| I heat | | you heat | | he/she/it heats | | we heat | | you heat | | they heat |
| Preterite |
|---|
| I heated | | you heated | | he/she/it heated | | we heated | | you heated | | they heated |
| Present Continuous |
|---|
| I am heating | | you are heating | | he/she/it is heating | | we are heating | | you are heating | | they are heating |
| Present Perfect |
|---|
| I have heated | | you have heated | | he/she/it has heated | | we have heated | | you have heated | | they have heated |
| Past Continuous |
|---|
| I was heating | | you were heating | | he/she/it was heating | | we were heating | | you were heating | | they were heating |
| Past Perfect |
|---|
| I had heated | | you had heated | | he/she/it had heated | | we had heated | | you had heated | | they had heated |
| Future |
|---|
| I will heat | | you will heat | | he/she/it will heat | | we will heat | | you will heat | | they will heat |
| Future Perfect |
|---|
| I will have heated | | you will have heated | | he/she/it will have heated | | we will have heated | | you will have heated | | they will have heated |
| Future Continuous |
|---|
| I will be heating | | you will be heating | | he/she/it will be heating | | we will be heating | | you will be heating | | they will be heating |
| Present Perfect Continuous |
|---|
| I have been heating | | you have been heating | | he/she/it has been heating | | we have been heating | | you have been heating | | they have been heating |
| Future Perfect Continuous |
|---|
| I will have been heating | | you will have been heating | | he/she/it will have been heating | | we will have been heating | | you will have been heating | | they will have been heating |
| Past Perfect Continuous |
|---|
| I had been heating | | you had been heating | | he/she/it had been heating | | we had been heating | | you had been heating | | they had been heating |
| Conditional |
|---|
| I would heat | | you would heat | | he/she/it would heat | | we would heat | | you would heat | | they would heat |
| Past Conditional |
|---|
| I would have heated | | you would have heated | | he/she/it would have heated | | we would have heated | | you would have heated | | they would have heated |
heatA form of energy passed between bodies of differing temperature.Thesaurus| Noun | 1. |  heat - a form of energy that is transferred by a difference in temperatureheat energyenergy, free energy - (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms"geothermal energy - energy derived from the heat in the interior of the earthheat of dissociation - the heat required for a fluid substance to break up into simpler constituentsheat of formation - the heat evolved or absorbed during the formation of one mole of a substance from its component elementsheat of solution - the heat evolved or absorbed when one mole of a substance is dissolved in a large volume of a solventheat of transformation, latent heat - heat absorbed or radiated during a change of phase at a constant temperature and pressurespecific heat - the heat required to raise the temperature of one gram of a substance one degree centigrade | | 2. | heat - the presence of heathigh temperature, hotnesstemperature - the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)calefaction, incalescence - the property of being warmingfieriness, red heat - the heat or the color of firetorridity - extreme heatwarmness, warmth - the quality of having a moderate degree of heat; "an agreeable warmth in the house"white heat - the hotness of something heated until it turns white | | 3. |  heat - the sensation caused by heat energywarmthtemperature - the somatic sensation of cold or heat | | 4. |  heat - the trait of being intensely emotionalpassion, warmthemotionalism, emotionality - emotional nature or qualityfieriness - a passionate and quick-tempered nature | | 5. |  heat - applies to nonhuman mammals: a state or period of heightened sexual arousal and activityestrus, oestrus, rutphysical condition, physiological condition, physiological state - the condition or state of the body or bodily functions | | 6. | heat - a preliminary race in which the winner advances to a more important racerace - a contest of speed; "the race is to the swift" | | 7. |  heat - utility to warm a building; "the heating system wasn't working"; "they have radiant heating"heating plant, heating system, heatingboiler, steam boiler - sealed vessel where water is converted to steambuilding, edifice - a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"central heating - a heating system in which air or water is heated at a central furnace and sent through the building via vents or pipes and radiatorsgas heat - heating system that burns natural gaspanel heating - heating system consisting of wall or floor or baseboard or ceiling panels containing electric conductors or heating pipesradiator - heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildingssteam heat, steam heating - a heating system in which steam is generated in boilers and piped to radiatorsutility - a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal; "the price of the house included all utilities" | | Verb | 1. | heat - make hot or hotter; "the sun heats the oceans"; "heat the water on the stove"heat upalter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"crispen, toast, crisp - make brown and crisp by heating; "toast bread"; "crisp potatoes"scald - heat to the boiling point; "scald the milk"soak - heat a metal prior to working itcalcine - heat a substance so that it oxidizes or reducespreheat - heat beforehand; "Preheat the oven!"overheat - make excessively or undesirably hot; "The room was overheated"scorch, sear - make very hot and dry; "The heat scorched the countryside"broil, bake - heat by a natural force; "The sun broils the valley in the summer"reheat - heat again; "Please reheat the food from last night"cool, cool down, chill - make cool or cooler; "Chill the food" | | 2. | heat - provide with heat; "heat the house"furnish, provide, supply, render - give something useful or necessary to; "We provided the room with an electrical heater"steam-heat - heat by means of steam | | 3. |  heat - arouse or excite feelings and passions; "The ostentatious way of living of the rich ignites the hatred of the poor"; "The refugees' fate stirred up compassion around the world"; "Wake old feelings of hatred"fire up, stir up, wake, ignite, inflamearouse, elicit, evoke, provoke, enkindle, kindle, fire, raise - call forth (emotions, feelings, and responses); "arouse pity"; "raise a smile"; "evoke sympathy"ferment - work up into agitation or excitement; "Islam is fermenting Africa" | | 4. | heat - gain heat or get hot; "The room heated up quickly"heat up, hot upchange state, turn - undergo a transformation or a change of position or action; "We turned from Socialism to Capitalism"; "The people turned against the President when he stole the election"overheat - get excessively and undesirably hot; "The car engines overheated"fry - be excessively hot; "If the children stay out on the beach for another hour, they'll be fried"cool, cool down, chill - loose heat; "The air cooled considerably after the thunderstorm" |
heatverb1. (sometimes with up) warm (up), cook, fry, boil, roast, reheat, make hot Meanwhile, heat the tomatoes and oil in a pan.
warm (up) cool, freeze, chill, cool offnoun1. warmth, hotness, temperature, swelter, sultriness, fieriness, torridity, warmness, calefaction leaves drooped in the fierce heat of the sun
warmth cold, coolness, coldness2. hot weather, warmth, closeness, high temperature, heatwave, warm weather, hot climate, hot spell, mugginess The heat is killing me.3. passion, excitement, intensity, violence, fever, fury, warmth, zeal, agitation, fervour, ardour, vehemence, earnestness, impetuosity It was all done in the heat of the moment.
passion composure, coolness, coldness, calmnessget heated up get excited, be stimulated, be stirred, become animated, be roused, be inflamed, be inspirited, become impassioned I get very heated up when people say that.heat up1. intensify, increase, heighten, deepen, escalate The war of words continues to heat up.2. warm up, get hotter, become hot, rise in temperature, become warm, grow hot In the summer her mobile home heats up like an oven.Related words
adjectives thermal, calorific
fear thermophobiaProverbs
"If you can't stand the heat get out of the kitchen"heatnoun1. Intense warmth:fervor, hotness, torridity, torridness.2. Intensity of feeling or reaction:excitation, excitement, warmth.3. A regular period of sexual excitement in female mammals:estrus, rut, season.4. Slang. A member of a law-enforcement agency:bluecoat, finest, officer, patrolman, patrolwoman, peace officer, police, policeman, police officer, policewoman.Informal: cop, law.Slang: bull, copper, flatfoot, fuzz, gendarme, man (often uppercase).Chiefly British: bobby, constable, peeler.Translationsheat (hiːt) noun1. the amount of hotness (of something), especially of things which are very hot. Test the heat of the water before you bath the baby. 熱度 热度2. the warmth from something which is hot. The heat from the fire will dry your coat; the effect of heat on metal; the heat of the sun. 熱 热3. the hottest time. the heat of the day. 最熱時 最热时4. anger or excitement. He didn't mean to be rude – he just said that in the heat of the moment. 憤怒，激動 愤怒，激动 5. in a sports competition etc, one of two or more contests from which the winners go on to take part in later stages of the competition. Having won his heat he is going through to the final. 預賽 预赛 verb (sometimes with up) to make or become hot or warm. We'll heat (up) the soup; The day heats up quickly once the sun has risen. 加熱，變熱 把...加热ˈheated adjective1. having been made hot. a heated swimming-pool. 已加熱的 加了热的2. showing anger, excitement etc. a heated argument. 發怒的，激動的 发怒的ˈheatedly adverb 激動地 激动地ˈheatedness noun 激動 热烈ˈheater noun an apparatus which gives out heat in order to warm a room etc, or which heats water etc eg in a water-tank. 加熱器 加热器ˈheating noun the system of heaters etc which heat a room, building etc. We turn the heating off in the summer. 暖氣系統 供暖系统，暖气装置 heat wave a period of very hot weather. 熱浪 热浪in/on heat (of female animals) in a condition for mating. (母獸)發情 （母兽）发情
see also hot. - I can't turn the heat off (US)
I can't turn the heating off (UK) → 暖气关不掉 - I can't turn the heat on (US)
I can't turn the heating on (UK) → 暖气打不开 - I can't sleep for the heat → 太热，我无法睡觉
heat
heat1. and the heat n. the police. (Underworld.) The heat is gonna catch up with you, Ernie. 2. n. pressure. The boss put some heat on Willy, and things are moving faster now. 3. n. a gun; armaments. (see also heater.) Lefty has his heat on him at all times. See:- be in heat
- be packing (heat)
- beat the heat
- catch heat
- come in heat
- come in(to) heat
- dead heat
- dead heat, in a
- get in(to) heat
- go in(to) heat
- heat
- heat up
- heat wave
- If you can’t stand the heat, keep out of the kitchen
- if you can't stand the heat
- if you can't stand the heat, get out of the kitchen
- if you can't stand the heat, keep out of the kitchen
- in a dead heat
- in heat
- in the heat of
- in the heat of (something)
- in the heat of the moment
- it's not the heat, it's the humidity
- pack heat
- put the heat on
- put the heat on (one)
- put the heat on someone
- put the screws on someone
- take (some) heat
- take some heat
- take the heat
- take the heat off
- take the heat off (of) (someone or something)
- take the heat off someone
- take the heat out of (something)
- take the heat out of something
- take the heat, to
- the heat
- the heat is on
- turn on the heat
- turn the heat on (someone or something)
- turn the heat on someone or something
- turn the heat up
- turn up the heat
- turn up the heat on
- turn up the heat on someone
heat
heat, nonmechanical energyenergy,
in physics, the ability or capacity to do work or to produce change. Forms of energy include heat, light, sound, electricity, and chemical energy. Energy and work are measured in the same units—foot-pounds, joules, ergs, or some other, depending on the system of
..... Click the link for more information. in transit, associated with differences in temperaturetemperature,
measure of the relative warmth or coolness of an object. Temperature is measured by means of a thermometer or other instrument having a scale calibrated in units called degrees. The size of a degree depends on the particular temperature scale being used.
..... Click the link for more information. between a system and its surroundings or between parts of the same system. Measures of Heat Temperature is a measure of the average translational kinetic energy of the molecules of a system. Heat is commonly expressed in either of two units: the caloriecalorie,
abbr. cal, unit of heat energy in the metric system. The measurement of heat is called calorimetry. The calorie, or gram calorie, is the quantity of heat required to raise the temperature of 1 gram of pure water 1°C;.
..... Click the link for more information. , an older metric unit, and the British thermal unitBritish thermal unit,
abbr. Btu, unit for measuring heat quantity in the customary system of English units of measurement, equal to the amount of heat required to raise the temperature of one pound of water at its maximum density [which occurs at a temperature of 39.
..... Click the link for more information. (Btu), an English unit commonly used in the United States. Scientists express heat in terms of the joulejoule
, abbr. J, unit of work or energy in the mks system of units, which is based on the metric system; it is the work done or energy expended by a force of 1 newton acting through a distance of 1 meter. The joule is named for James P. Joule.
..... Click the link for more information. , a unit used for all forms of energy. Specific Heat As heat is added to a substance in the solid state, the molecules of the substance gain kinetic energy and the temperature of the substance rises. The amount of heat needed to raise a unit of mass of the substance one degree of temperature is called the specific heatspecific heat,
ratio of the heat capacity of a substance to the heat capacity of a reference substance, usually water. Heat capacity is the amount of heat needed to change the temperature of a unit mass 1°.
..... Click the link for more information. of the substance. Because of the way in which the calorie and the Btu are defined, the specific heat of any substance is the same in either system of measurement. For example, the specific heat of water is 1 calorie per gram per degree Celsius; i.e., 1 calorie of heat is needed to raise the temperature of 1 gram of water by 1 degree Celsius; it is also 1 Btu per pound per degree Fahrenheit. Heat of Fusion When a solid reaches a certain temperature, it changes to a liquid. This temperature is a particular property of the substance and is called its melting pointmelting point,
temperature at which a substance changes its state from solid to liquid. Under standard atmospheric pressure different pure crystalline solids will each melt at a different specific temperature; thus melting point is a characteristic of a substance and can be used
..... Click the link for more information. . While the solid-liquid transition is taking place, there is no change in temperature. All of the heat being added is being converted to the internal potential energy associated with the liquid state. The amount of heat needed to convert one unit of mass of a substance from a solid to liquid is called the heat of fusion, or latent heat of fusion, of the substance. Like specific heat, latent heatlatent heat,
heat change associated with a change of state or phase (see states of matter). Latent heat, also called heat of transformation, is the heat given up or absorbed by a unit mass of a substance as it changes from a solid to a liquid, from a liquid to a gas, or the
..... Click the link for more information. is also a property of the particular substance. The latent heat of fusion for the ice-to-water transition is 80 calories per gram. Heat of Vaporization After a substance is completely changed from a solid to a liquid, further addition of heat again causes the temperature to rise until it reaches the boiling pointboiling point,
temperature at which a substance changes its state from liquid to gas. A stricter definition of boiling point is the temperature at which the liquid and vapor (gas) phases of a substance can exist in equilibrium.
..... Click the link for more information. , the particular temperature at which the given substance changes from a liquid to a gas. During the liquid-gas transition, the temperature remains constant until the change is completed. The heat of vaporization, or latent heat of vaporization, is the heat that must be added to convert one unit of mass of the substance from a liquid to a gas. Transfer of Heat Heat may be transferred from one substance to another by three means—conductionconduction,
transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a difference in electric potential, in the case of electricity.
..... Click the link for more information. , convectionconvection,
mode of heat transfer in fluids (liquids and gases). Convection depends on the fact that, in general, fluids expand when heated and thus undergo a decrease in density (since a given volume of the fluid contains less matter at a higher temperature than at the
..... Click the link for more information. , and radiationradiation
, term applied to the emission and transmission of energy through space or through a material medium and also to the radiated energy itself. In its widest sense the term includes electromagnetic, acoustic, and particle radiation, and all forms of ionizing radiation.
..... Click the link for more information. . Conduction involves the transfer of energy from one molecule to adjacent molecules without the substance as a whole moving. Convection involves the movement of warmer parts of a substance away from the source of heat and takes place only in fluids, i.e., liquids and gases. Radiation is the transfer of heat energy in the form of electromagnetic radiationelectromagnetic radiation,
energy radiated in the form of a wave as a result of the motion of electric charges. A moving charge gives rise to a magnetic field, and if the motion is changing (accelerated), then the magnetic field varies and in turn produces an electric field.
..... Click the link for more information. , principally in the infrared radiationinfrared radiation,
electromagnetic radiation having a wavelength in the range from c.75 × 10−6 cm to c.100,000 × 10−6 cm (0.000075–0.1 cm).
..... Click the link for more information. portion of the spectrum. Study and Analysis of Heat The study of heat and its relationship to useful work is called thermodynamicsthermodynamics,
branch of science concerned with the nature of heat and its conversion to mechanical, electric, and chemical energy. Historically, it grew out of efforts to construct more efficient heat engines—devices for extracting useful work from expanding hot gases.
..... Click the link for more information. and involves macroscopic quantities such as pressure, temperature, and volume without regard for the molecular basis of these quantities. Low-temperature physicslow-temperature physics,
science concerned with the production and maintenance of temperatures much below normal, down to almost absolute zero, and with various phenomena that occur only at such temperatures.
..... Click the link for more information. is concerned with phenomena that occur at extremely low temperatures. The analysis of heat on the basis of the structure of matter is considered in the kinetic-molecular theory of gaseskinetic-molecular theory of gases,
physical theory that explains the behavior of gases on the basis of the following assumptions: (1) Any gas is composed of a very large number of very tiny particles called molecules; (2) The molecules are very far apart compared to their sizes,
..... Click the link for more information. and provides an explanation for the various gas lawsgas laws,
physical laws describing the behavior of a gas under various conditions of pressure, volume, and temperature. Experimental results indicate that all real gases behave in approximately the same manner, having their volume reduced by about the same proportion of the
..... Click the link for more information. . The gas laws in turn serve to define an absolute temperature scale based on theoretical considerations (see Kelvin temperature scaleKelvin temperature scale,
a temperature scale having an absolute zero below which temperatures do not exist. Absolute zero, or 0°K;, is the temperature at which molecular energy is a minimum, and it corresponds to a temperature of −273.
..... Click the link for more information. ). Bibliography See M. C. Mott-Smith, Heat and Its Workings (1933, repr. 1962); R. Becker, Theory of Heat (tr. 1967). Heat For the purposes of thermodynamics, it is convenient to define all energy while in transit, but unassociated with matter, as either heat or work. Heat is that form of energy in transit due to a temperature difference between the source from which the energy is coming and the sink toward which the energy is going. The energy is not called heat before it starts to flow or after it has ceased to flow. A hot object does contain energy, but calling this energy heat as it resides in the hot object can lead to widespread confusion. See Energy, Internal energy, Temperature, Thermodynamic principles Heat a sensation of excessive warmth, usually confirmed by elevation of body temperature. Heat may be felt by some persons without a rise of body temperature; this can be caused by functional disturbances of the nervous system or by the introduction of certain medications (for example, nicotinic acid, magnesium sulfate, and calcium chloride) that cause dilatation of the blood vessels. Local sensation of heat can result from arterial hyperemia, a change in blood circulation, and increased metabolism in inflamed tissues. heat[hēt] (thermodynamics) Energy in transit due to a temperature difference between the source from which the energy is coming and a sink toward which the energy is going; other types of energy in transit are called work. heatThe form of energy that is transferred by virtue of a temperature difference between two bodies, the transfer being from the warmer to the cooler body.heat1. a. the energy transferred as a result of a difference in temperature b. the random kinetic energy of the atoms, molecules, or ions in a substance or body 2. the sensation caused in the body by heat energy; warmth 3. a period or condition of sexual excitement in female mammals that occurs at oestrus 4. Sporta. a preliminary eliminating contest in a competition b. a single section of a contest 5. on or in heata. (of some female mammals) sexually receptive b. in a state of sexual excitement LegalSeeHeat of PassionHEAT
| Acronym | Definition |
|---|
| HEAT➣Hostile Environment Awareness Training | | HEAT➣High-Explosive Anti-Tank (munition) | | HEAT➣Heat Escape Lessening Posture | | HEAT➣Highway Enforcement of Aggressive Traffic (various locations) | | HEAT➣Higher Education and Training (IBM) | | HEAT➣Higher Education Assistive Technology (various locations) | | HEAT➣High-Energy Antimatter Telescope | | HEAT➣Help End Auto Theft | | HEAT➣Humanitarian Environmental Analysis Team (Godzilla) | | HEAT➣Home Energy Assistance Team | | HEAT➣Higher Education Area Transit (Greensboro, North Carolina) | | HEAT➣Higher Education and Applied Technology Center (Harford County, MD) | | HEAT➣Helpdesk Expert Automation Tool | | HEAT➣High Energy Access Tools | | HEAT➣Hemisphere Emergency Action Team | | HEAT➣HMMWV(High Mobility Multipurpose Wheeled Vehicle) Egress Assistance Trainer (US DoD) | | HEAT➣Higher Education and Advanced Technology Center (Lowry, CO, USA) | | HEAT➣Headquarters Effectiveness Assessment Tool | | HEAT➣hydroxyphenyl-ethyl-aminomethyl-tetralone | | HEAT➣Hal's Emerald Attack Team | | HEAT➣Hackers Enterprising Across Telecommunications | | HEAT➣High-rise Emergency Aerial Team | | HEAT➣Hoffman Estates Airsoft Team (Chicago, IL) | | HEAT➣High-Enthalpy Arc-heated Tunnel | | HEAT➣Hotel Employees Action Team | | HEAT➣Human Erythrocyte Aglutination Test |
heat
Related to heat: heat exhaustion, heat pump, heat energy, heat stroke, specific heat, Heat transferSynonyms for heatverb warm (up)Synonyms- warm (up)
- cook
- fry
- boil
- roast
- reheat
- make hot
Antonymsnoun warmthSynonyms- warmth
- hotness
- temperature
- swelter
- sultriness
- fieriness
- torridity
- warmness
- calefaction
Antonymsnoun hot weatherSynonyms- hot weather
- warmth
- closeness
- high temperature
- heatwave
- warm weather
- hot climate
- hot spell
- mugginess
noun passionSynonyms- passion
- excitement
- intensity
- violence
- fever
- fury
- warmth
- zeal
- agitation
- fervour
- ardour
- vehemence
- earnestness
- impetuosity
Antonyms- composure
- coolness
- coldness
- calmness
phrase get heated upSynonyms- get excited
- be stimulated
- be stirred
- become animated
- be roused
- be inflamed
- be inspirited
- become impassioned
phrase heat up: intensifySynonyms- intensify
- increase
- heighten
- deepen
- escalate
phrase heat up: warm upSynonyms- warm up
- get hotter
- become hot
- rise in temperature
- become warm
- grow hot
Synonyms for heatnoun intense warmthSynonyms- fervor
- hotness
- torridity
- torridness
noun intensity of feeling or reactionSynonyms- excitation
- excitement
- warmth
noun a regular period of sexual excitement in female mammalsSynonymsnoun a member of a law-enforcement agencySynonyms- bluecoat
- finest
- officer
- patrolman
- patrolwoman
- peace officer
- police
- policeman
- police officer
- policewoman
- cop
- law
- bull
- copper
- flatfoot
- fuzz
- gendarme
- man
- bobby
- constable
- peeler
Synonyms for heatnoun a form of energy that is transferred by a difference in temperatureSynonymsRelated Words- energy
- free energy
- geothermal energy
- heat of dissociation
- heat of formation
- heat of solution
- heat of transformation
- latent heat
- specific heat
noun the presence of heatSynonymsRelated Words- temperature
- calefaction
- incalescence
- fieriness
- red heat
- torridity
- warmness
- warmth
- white heat
noun the sensation caused by heat energySynonymsRelated Wordsnoun the trait of being intensely emotionalSynonymsRelated Words- emotionalism
- emotionality
- fieriness
noun applies to nonhuman mammals: a state or period of heightened sexual arousal and activitySynonymsRelated Words- physical condition
- physiological condition
- physiological state
noun a preliminary race in which the winner advances to a more important raceRelated Wordsnoun utility to warm a buildingSynonyms- heating plant
- heating system
- heating
Related Words- boiler
- steam boiler
- building
- edifice
- central heating
- gas heat
- panel heating
- radiator
- steam heat
- steam heating
- utility
verb make hot or hotterSynonymsRelated Words- alter
- change
- modify
- crispen
- toast
- crisp
- scald
- soak
- calcine
- preheat
- overheat
- scorch
- sear
- broil
- bake
- reheat
Antonymsverb provide with heatRelated Words- furnish
- provide
- supply
- render
- steam-heat
verb arouse or excite feelings and passionsSynonyms- fire up
- stir up
- wake
- ignite
- inflame
Related Words- arouse
- elicit
- evoke
- provoke
- enkindle
- kindle
- fire
- raise
- ferment
verb gain heat or get hotSynonymsRelated Words- change state
- turn
- overheat
- fry
Antonyms |