Definition of radiation in English:

radiation

noun reɪdɪˈeɪʃ(ə)nˌreɪdiˈeɪʃ(ə)n

mass noun

1Physics
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
Example sentencesExamples
- Because it uses sound waves instead of radiation, ultrasound is safer than X-rays.
- We now know that invisible forces do control some things: gravity, radiation, electricity.
- Huygens stated that an expanding sphere of light behaves as if each point on the wave front were a new source of radiation of the same frequency and phase.
- The board does say that there is still a need for further research into other concerns over the safety of microwave radiation.
- When taken up by obstacles, beta particles produce a more penetrative secondary radiation known as bremsstrahlung.
Synonyms
discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection
1. 1.1 The energy transmitted by radiation.
  background radiation
  as modifier the radiation dose
  count noun ultraviolet and infrared radiations
  Example sentencesExamples
  Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element.
  A radioactive source will emit these radiations at various frequencies, depending on its activity and its decay mode.
  This foil doesn't do very well in the air, but it protected it from meteorites and from the ultraviolet radiations from the sun.
  The total spectrum of solar radiation comprises ultraviolet radiations, visible light, and infra-red radiations, in order of increasing electromagnetic wavelengths.
  It is these materials that emit gamma rays, high energy radiation that can pass right through your skin.
  Synonyms
  transference, transferral, passing on, communication, conveyance, imparting, channelling, carrying, relaying, dispatch, mediation
2Biology
Divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms.
evolution is a process of radiation not progression
Example sentencesExamples
- The radiation of modern felines began with the divergence of the Panthera lineage.
- This famous site in British Columbia has yielded much fundamental information on the early radiation of the major animal groups.
- During the Oligocene, the South American rodents began their great evolutionary radiation.
- Each of these pulses is a major evolutionary radiation of the Theropsid lineage.
- Rate variation among lineages is the footprint of selection and can be indicative of species radiations or differential structural constraints.

Derivatives

radiational

adjective ˌreɪdɪˈeɪʃ(ə)n(ə)lˌreɪdiˈeɪʃ(ə)nəl

Relating to or involving radiation.
heat lost through radiational cooling
Example sentencesExamples
- As it stagnates, with the days as long as they are, and the short nights, we don't have the radiational cooling and it just goes on and on.
- On level sites, radiational cooling rather than cold air drainage is most significant in generating the ‘frost pocket’ phenomenon.
- When this cloud is present, night-time radiational cooling is much reduced and widespread fog is consequently not usually a problem.

radiationally

adverbˌreɪdɪˈeɪʃ(ə)n(ə)liˌreɪdiˈeɪʃ(ə)n(ə)li

Origin

Late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare 'emit rays' (see radiate).

ray from Middle English:
The ray that means ‘beam of light’ is a medieval word going back to Latin radius ‘spoke, ray’, the source of radiate (late 16th century) , radio (early 20th century), and radius (late 16th century). The term ray of sunshine for someone who brings happiness into the lives of others, dating back to the early 20th century, is often used ironically for someone who in fact spreads little cheer. Ray as a name for a fish is a different word, from Latin raia.

Definition of radiation in US English:

radiation

nounˌrādēˈāSH(ə)nˌreɪdiˈeɪʃ(ə)n

1Physics
The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
Example sentencesExamples
- When taken up by obstacles, beta particles produce a more penetrative secondary radiation known as bremsstrahlung.
- The board does say that there is still a need for further research into other concerns over the safety of microwave radiation.
- We now know that invisible forces do control some things: gravity, radiation, electricity.
- Huygens stated that an expanding sphere of light behaves as if each point on the wave front were a new source of radiation of the same frequency and phase.
- Because it uses sound waves instead of radiation, ultrasound is safer than X-rays.
Synonyms
discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection
1. 1.1 The energy transmitted by radiation, as heat, light, electricity, etc.
  background radiation
  as modifier the radiation dose
  count noun ultraviolet and infrared radiations
  Example sentencesExamples
  The total spectrum of solar radiation comprises ultraviolet radiations, visible light, and infra-red radiations, in order of increasing electromagnetic wavelengths.
  Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element.
  This foil doesn't do very well in the air, but it protected it from meteorites and from the ultraviolet radiations from the sun.
  A radioactive source will emit these radiations at various frequencies, depending on its activity and its decay mode.
  It is these materials that emit gamma rays, high energy radiation that can pass right through your skin.
  Synonyms
  transference, transferral, passing on, communication, conveyance, imparting, channelling, carrying, relaying, dispatch, mediation
2Biology
Divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms.
evolution is a process of radiation not progression
Example sentencesExamples
- During the Oligocene, the South American rodents began their great evolutionary radiation.
- Each of these pulses is a major evolutionary radiation of the Theropsid lineage.
- Rate variation among lineages is the footprint of selection and can be indicative of species radiations or differential structural constraints.
- The radiation of modern felines began with the divergence of the Panthera lineage.
- This famous site in British Columbia has yielded much fundamental information on the early radiation of the major animal groups.

Origin

Late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare ‘emit rays’ (see radiate).

单词	radiation
释义	Definition of radiation in English: radiation noun reɪdɪˈeɪʃ(ə)nˌreɪdiˈeɪʃ(ə)n mass noun 1Physics The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization. Example sentencesExamples Because it uses sound waves instead of radiation, ultrasound is safer than X-rays. We now know that invisible forces do control some things: gravity, radiation, electricity. Huygens stated that an expanding sphere of light behaves as if each point on the wave front were a new source of radiation of the same frequency and phase. The board does say that there is still a need for further research into other concerns over the safety of microwave radiation. When taken up by obstacles, beta particles produce a more penetrative secondary radiation known as bremsstrahlung. Synonyms discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection 1.1 The energy transmitted by radiation. background radiation as modifier the radiation dose count noun ultraviolet and infrared radiations Example sentencesExamples Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element. A radioactive source will emit these radiations at various frequencies, depending on its activity and its decay mode. This foil doesn't do very well in the air, but it protected it from meteorites and from the ultraviolet radiations from the sun. The total spectrum of solar radiation comprises ultraviolet radiations, visible light, and infra-red radiations, in order of increasing electromagnetic wavelengths. It is these materials that emit gamma rays, high energy radiation that can pass right through your skin. Synonyms transference, transferral, passing on, communication, conveyance, imparting, channelling, carrying, relaying, dispatch, mediation 2Biology Divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms. evolution is a process of radiation not progression Example sentencesExamples The radiation of modern felines began with the divergence of the Panthera lineage. This famous site in British Columbia has yielded much fundamental information on the early radiation of the major animal groups. During the Oligocene, the South American rodents began their great evolutionary radiation. Each of these pulses is a major evolutionary radiation of the Theropsid lineage. Rate variation among lineages is the footprint of selection and can be indicative of species radiations or differential structural constraints. Derivatives radiational adjective ˌreɪdɪˈeɪʃ(ə)n(ə)lˌreɪdiˈeɪʃ(ə)nəl Relating to or involving radiation. heat lost through radiational cooling Example sentencesExamples As it stagnates, with the days as long as they are, and the short nights, we don't have the radiational cooling and it just goes on and on. On level sites, radiational cooling rather than cold air drainage is most significant in generating the ‘frost pocket’ phenomenon. When this cloud is present, night-time radiational cooling is much reduced and widespread fog is consequently not usually a problem. radiationally adverbˌreɪdɪˈeɪʃ(ə)n(ə)liˌreɪdiˈeɪʃ(ə)n(ə)li Origin Late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare 'emit rays' (see radiate). ray from Middle English: The ray that means ‘beam of light’ is a medieval word going back to Latin radius ‘spoke, ray’, the source of radiate (late 16th century) , radio (early 20th century), and radius (late 16th century). The term ray of sunshine for someone who brings happiness into the lives of others, dating back to the early 20th century, is often used ironically for someone who in fact spreads little cheer. Ray as a name for a fish is a different word, from Latin raia. Definition of radiation in US English: radiation nounˌrādēˈāSH(ə)nˌreɪdiˈeɪʃ(ə)n 1Physics The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization. Example sentencesExamples When taken up by obstacles, beta particles produce a more penetrative secondary radiation known as bremsstrahlung. The board does say that there is still a need for further research into other concerns over the safety of microwave radiation. We now know that invisible forces do control some things: gravity, radiation, electricity. Huygens stated that an expanding sphere of light behaves as if each point on the wave front were a new source of radiation of the same frequency and phase. Because it uses sound waves instead of radiation, ultrasound is safer than X-rays. Synonyms discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection 1.1 The energy transmitted by radiation, as heat, light, electricity, etc. background radiation as modifier the radiation dose count noun ultraviolet and infrared radiations Example sentencesExamples The total spectrum of solar radiation comprises ultraviolet radiations, visible light, and infra-red radiations, in order of increasing electromagnetic wavelengths. Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element. This foil doesn't do very well in the air, but it protected it from meteorites and from the ultraviolet radiations from the sun. A radioactive source will emit these radiations at various frequencies, depending on its activity and its decay mode. It is these materials that emit gamma rays, high energy radiation that can pass right through your skin. Synonyms transference, transferral, passing on, communication, conveyance, imparting, channelling, carrying, relaying, dispatch, mediation 2Biology Divergence out from a central point, in particular evolution from an ancestral animal or plant group into a variety of new forms. evolution is a process of radiation not progression Example sentencesExamples During the Oligocene, the South American rodents began their great evolutionary radiation. Each of these pulses is a major evolutionary radiation of the Theropsid lineage. Rate variation among lineages is the footprint of selection and can be indicative of species radiations or differential structural constraints. The radiation of modern felines began with the divergence of the Panthera lineage. This famous site in British Columbia has yielded much fundamental information on the early radiation of the major animal groups. Origin Late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare ‘emit rays’ (see radiate).
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