Radiation consists of very small particles of a radioactive substance. Large amounts of radiation can cause illness and death.
They fear the long term effects of radiation.
If the cancer returns, radiation therapy is successful in 90 per cent of cases.
2. uncountable noun
Radiation is energy, especially heat, that comes from a particular source.
The satellite will study energy radiation from stars.
More Synonyms of radiation
radiation in British English
(ˌreɪdɪˈeɪʃən)
noun
1. physics
a.
the emission or transfer of radiant energy as particles, electromagnetic waves, sound, etc
b.
the particles, etc, emitted, esp the particles and gamma rays emitted in nuclear decay
2. Also called: radiation therapy medicine
treatment using a radioactive substance
3. anatomy
a group of nerve fibres that diverge from their common source
4. adaptive radiation
5.
the act, state, or process of radiating or being radiated
6. surveying
the fixing of points around a central plane table by using an alidade and measuring tape
Derived forms
radiational (ˌradiˈational)
adjective
radiation in American English
(ˌreɪdiˈeɪʃən)
noun
1.
the act or process of radiating; specif., the process in which energy in the formof rays of light, heat, etc. is sent out through space from atoms and molecules as they undergo internal change
2.
the rays sent out; radiant energy
3.
radial arrangement of parts
4. Biology
adaptive radiation
5. Nuclear Physics
energy emitted as electromagnetic waves, as gamma or X-rays, or as energetic nuclear particles, as neutrons, alpha and beta particles, etc.
Derived forms
radiational (ˌradiˈational)
adjective
radiative (ˈradiˌative)
adjective
Word origin
L radiatio
radiation in Chemical Engineering
(reɪdieɪʃən)
noun
(Chemical Engineering: Heat transfer)
Radiation is the flow of heat from one surface to another by infrared waves (= waves with a longer distance between them than waves of visible light).
Solar cells generate electric power from the sun's radiation.
When two solid surfaces at different temperatures are separated by a transparentfluid phase, they will exchange thermal energy by radiation.
Radiation is the flow of heat from one surface to another by infrared waves.
radiation in Mechanical Engineering
(reɪdieɪʃən)
noun
(Mechanical engineering: Energy, thermodynamics and heat transfer)
Radiation is the flow of heat from one surface to another by infrared waves.
Solar cells generate electric power from the sun's radiation.
When two solid surfaces at different temperatures are separated by a transparentfluid phase, they will exchange thermal energy by radiation.
Radiation is the flow of heat from one surface to another by infrared waves.
Examples of 'radiation' in a sentence
radiation
The radiation causes chemical changes in the brain that resemble symptoms of Alzheimer's.
The Sun (2016)
In the decades that followed many died of radiation sickness and cancers.
Times, Sunday Times (2010)
We are surrounded by radiation from natural sources.
Martlew, Gillian & Silver, Shelley Stay Well This Winter (1989)
Research has already shown mobiles emit radiation and can heat up brain cells.
The Sun (2011)
The photos during her radiation treatment were difficult to take.
The Sun (2012)
The first time that nuclear radiation has been washed off with a quick shower.
Times, Sunday Times (2012)
The only currently established cause is radiation.
Times, Sunday Times (2006)
He is reportedly having a revolutionary new radiation treatment.
The Sun (2009)
It means that nuclear radiation will now be released as it occurs in the reactor.
Times, Sunday Times (2011)
The main cause is ultraviolet radiation from the sun or sunbeds.
Times, Sunday Times (2008)
Doctors here said all they could offer was radiation treatment.
The Sun (2015)
It is also more resistant to heat and nuclear radiation.
Times, Sunday Times (2016)
Damage to the eyes caused by solar radiation.
Brumberg, Elaine Take Care of Your Skin (1990)
Name the primary sources of radiation.
McKenzie, James F. & Pinger, Robert R. An Introduction to Community Health (1995)
Here is a chart of the various groups of electromagnetic radiation, arranged according to their frequencies.
Schneider, Hermann & Schneider, Leo The Harper Dictionary of Science in Everyday Language (1988)
It survived heat, radiation and ultraviolet light.
Times, Sunday Times (2008)
Thousands in the north of Japan are displaced from their homes and live in fear of radiation.
Times, Sunday Times (2011)
She threw herself into researching treatments and refused brain radiation, fearing the effects on her faculties.
Times, Sunday Times (2015)
They said electromagnetic radiation emitted by mobile and cordless phones can damage cells, making tumours more likely.
The Sun (2012)
The local church was full of well-heeled people poring over leaflets about the possible dangers of electromagnetic radiation.
Times, Sunday Times (2006)
Hundreds of nuclear workers have died of heart attacks and other circulatory illnesses brought on by radiation, a study suggests.
Times, Sunday Times (2008)
Another 70,000 would die in the days, years and decades ahead from radiation sickness and cancer.
The Sun (2015)
Dry dust or dry soot acts as an optical filter, blocking sunlight from reaching the ground but allowing heat radiation from the ground to escape into space.
Dyson, Freeman Infinite in All Directions (1989)
Here the dust cloud can change the radiation balance of the world by shielding us from sunshine while also absorbing the Earth's heat radiation.
Times, Sunday Times (2010)
In other languages
radiation
British English: radiation /ˌreɪdɪˈeɪʃən/ NOUN
Radiation is very small particles of a radioactive substance. Large amounts of radiation can cause illness and death.
... the effects of radiation.
American English: radiation
Arabic: إِشْعَاع
Brazilian Portuguese: radiação
Chinese: 辐射
Croatian: radijacija
Czech: radiace
Danish: stråling
Dutch: straling
European Spanish: radiación
Finnish: säteily
French: rayonnement
German: Strahlung
Greek: ακτινοβολία
Italian: radiazione
Japanese: 放射
Korean: 복사
Norwegian: stråling
Polish: promieniowanie
European Portuguese: radiação
Romanian: radiație
Russian: радиация
Latin American Spanish: radiación
Swedish: strålning
Thai: รังสี
Turkish: radyasyon
Ukrainian: радіація
Vietnamese: sự bức xạ
All related terms of 'radiation'
x-radiation
exposure to or treatment with X-rays
radiation fog
fog produced by the nocturnal cooling of the surface boundary layer to a temperature at which its content of water vapor condenses
alpha radiation
alpha particles emitted from a radioactive isotope
gamma radiation
electromagnetic radiation emitted by atomic nuclei ; the wavelength is generally in the range 1 × 10 –10 to 2 × 10 –13 metres
radiation belt
a region in the magnetosphere of a planet in which charged particles are trapped by the planet's magnetic field, an example being the earth's Van Allen belts
adaptive radiation
evolution of a number of divergent species from a common ancestor , each species becoming adapted to occupy a different environment . This type of evolution occurred in the Tertiary manuals and the Mesozoic reptiles
Cerenkov radiation
radiation emitted when a charged particle travels through a medium at a speed greater than the speed of light through that medium
cosmic radiation
radiation consisting of particles , esp protons , of very high energy that reach the earth from outer space
Hawking radiation
the emission of particles by a black hole . Pairs of virtual particles in the intense gravitational field around a black hole may live long enough for one to move outward when the other is pulled into the black hole, making it appear that the black hole is emitting radiation
ionizing radiation
electromagnetic or corpuscular radiation that is able to cause ionization
nuclear radiation
radiation in the form of elementary particles emitted by an atomic nucleus , as alpha rays or gamma rays, produced by decay of radioactive substances or by nuclear fission
radiation exposure
exposure to radiant energy or to the particles emitted in the transfer of radiant energy, esp the particles and gamma rays emitted in nuclear decay ; exposure to radioactive substances
radiation levels
the levels of the emission or transfer of radiant energy or the levels of the particles emitted in the transfer of radiant energy, esp the particles and gamma rays emitted in nuclear decay
radiation pattern
the graphic representation of the strength and direction of electromagnetic radiation in the vicinity of a transmitting aerial
radiation sickness
Radiation sickness is an illness that people get when they are exposed to too much radiation.
radiation therapy
the emission or transfer of radiant energy as particles, electromagnetic waves, sound, etc
visible radiation
electromagnetic radiation that causes the sensation of sight ; light. It has wavelengths between about 380 and 780 nanometres
background radiation
low-intensity radiation from, for example , small amounts of radioisotopes in soil , air, building materials, etc
Cherenkov radiation
the electromagnetic radiation produced when a charged particle moves through a medium at a greater velocity than the velocity of light in that medium
radiation pyrometer
an instrument for measuring high temperatures , esp by measuring the brightness ( optical pyrometer ) or total quantity ( radiation pyrometer ) of the radiation produced by the source. Other types include the resistance thermometer and the thermocouple
radiation resistance
the resistive component of the impedance of a radio transmitting aerial that arises from the radiation of power
radiation treatment
the emission or transfer of radiant energy as particles, electromagnetic waves, sound, etc
synchrotron radiation
electromagnetic radiation emitted in narrow beams tangential to the orbit of very high energy charged particles , such as electrons , spiralling along the lines of force in a strong magnetic field . It occurs in synchrotron accelerators and in many cosmic environments , such as radio galaxies and supernova remnants
electromagnetic radiation
radiation consisting of self-sustaining oscillating electric and magnetic fields at right angles to each other and to the direction of propagation. It does not require a supporting medium and travels through empty space at the speed of light
Planck's radiation law
the law that energy associated with electromagnetic radiation , as light, is composed of discrete quanta of energy, each quantum equal to Planck's constant times the corresponding frequency of the radiation: the fundamental law of quantum mechanics
enhanced radiation weapon
a type of nuclear weapon designed to provide a high yield of neutrons but to cause little blast or long-lived radioactive contamination . The neutrons destroy all life in the target area, which theoretically can be entered relatively soon after the attack
Van Allen radiation belt
a broad , doughnut-shaped region surrounding the earth and composed of high-energy electrons and protons trapped in the earth's magnetic field at heights between c. 400 km ( c. 250 mi ) and c. 64,370 km ( c. 40,000 mi)
antenna pattern
the graphic representation of the strength and direction of electromagnetic radiation in the vicinity of a transmitting aerial
gravitational wave
a wave-like motion in a gravitational field , produced when a mass is accelerated or otherwise disturbed ; they travel through space-time at the speed of light and the strongest sources are those with the strongest gravitational fields , although the waves are very weak ; predicted by Einstein in 1916 but not first observed directly until 2015
Stefan-Boltzmann law
the principle that the energy radiated per second by unit area of a black body at thermodynamic temperature T is directly proportional to T 4 . The constant of proportionality is the Stefan constant, equal to 5.670400 × 10 –8 Wm –2 K –4
neutron bomb
A neutron bomb is a nuclear weapon that is designed to kill people and animals without a large explosion and without destroying buildings or causing serious radioactive pollution .
Chinese translation of 'radiation'
radiation
(reɪdɪˈeɪʃən)
n(u)
(= radioactivity) 辐(輻)射 (fúshè)
(= radio waves) 射线(線) (shèxiàn)
(noun)
Definition
the process of radiating
They study energy radiation from the most violent stars in the universe.
Synonyms
emission
the emission of gases such as carbon dioxide
rays
emanation
The human body is surrounded by an aura of infrared emanations.
Additional synonyms
in the sense of emanation
The human body is surrounded by an aura of infrared emanations.