thermogˈrapher noun

thermographˈic adjective

thermogˈraphy noun

1. Any process of writing, photographing, etc involving the use of heat
2. A method of producing embossed text, using a heating process (printing)
3. The production of an image on film or a screen using an infrared camera
4. An image of heat emission from the patient's body used in medical diagnosis, eg for detecting tumours

thermohāˈline adjective (meteorology)

Involving both temperature and salinity

thermolāˈbile adjective

Readily decomposed by heat

thermolˈogy noun

The science of heat

thermoluminescˈence noun

Release of light by heating previously irradiated material, used in archaeological dating

thermoluminescˈent adjective

thermolˈysis noun

1. (see lysis) dissociation or dissolution by heat
2. Loss of body heat

thermolytˈic adjective

thermometer /-omˈi-tər/ noun

An instrument for measuring temperature depending on any of several properties of a substance that vary linearly with change of temperature, esp a graduated sealed tube containing mercury or alcohol

thermometric /-ə-metˈrik/ or thermometˈrical adjective

thermometˈrically adverb

thermometˈrograph noun

A self-registering thermometer, a thermograph

thermomˈetry noun

The branch of physics dealing with the measurement of temperature and the design of thermometers, etc

thermˈonasty noun

Nastic movement in response to heat or temperature change

thermonucˈlear adjective

1. Exhibiting or dealing with the fusion of nuclei as seen in a thermonuclear reaction, a power reaction produced by the fusion of nuclei at extremely high temperatures, as in the interior of stars and some nuclear weapons
2. Relating to the use of such reactions as a source of power or force

thermˈophile /-fil/, thermˈophil, thermophilˈic or thermophˈilous adjective

(of eg bacteria, plants) requiring, or thriving best in, high temperatures

thermophile or thermophil noun

A bacterium, plant, etc, that requires, or thrives best in, high temperatures

thermophˈyllous adjective

(Gr phyllon a leaf) (botany) having leaves only in the warmer part of the year, deciduous

thermˈopīle /-pīl/ noun

An apparatus, usu consisting of thermocouples, for the direct conversion of heat into electrical energy

thermoplastˈic adjective

Becoming plastic when heated and hardening again when cooled

Any resin that can be melted and cooled repeatedly without appreciable change in properties

thermoplasticˈity noun

thermˈoscope noun

An instrument for detecting changes of temperature

thermoscopˈic adjective

Indicating, or sensitive to, temperature changes

thermoscopˈically adverb

thermosettˈing adjective

(of eg resin or plastic) setting permanently, after melting and moulding

thermosiphˈon noun (engineering)

A method of circulating a cooling liquid through a system by using the slight difference in density between the hot and cool parts

thermˈosphere noun

The region of the earth's atmosphere above the mesosphere, in which the temperature rises steadily with height

thermostaˈble adjective

Not readily decomposed by heating

thermˈostat noun

A device for keeping temperature steady

thermostatˈic adjective

thermostatˈically adverb

thermotactˈic or thermotaxˈic adjective

Of or showing thermotaxis

thermotaxˈis noun

A movement of an organism towards a position of higher or lower temperature

thermotherˈapy noun (medicine)

The treatment of a part of the body by heat

thermotˈic or thermotˈical adjective

Of or due to heat

thermotˈics singular noun

The science of heat

thermotolˈerant adjective (botany)

Able to endure high temperatures but not growing well under such conditions

thermotropˈic adjective

Bending towards or away from a heat source

A thermotropic plant

thermotˈropism noun

(Gr tropos turning) the tendency of a plant to grow towards, or bend away from, a source of heat