Definitions for radiationˌreɪ diˈeɪ ʃən
Random House Webster's College Dictionary
ra•di•a•tionˌreɪ diˈeɪ ʃən(n.)
the process in which energy is emitted as particles or waves. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body. the energy transferred by these processes.
the act or process of radiating.
something that is radiated.
radial arrangement of parts.
Origin of radiation:
1545–55; < L radiātiō gleam. See radiate , -tion
energy that is radiated or transmitted in the form of rays or waves or particles
the act of spreading outward from a central source
radiation sickness, radiation syndrome, radiation(noun)
syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours
"he was suffering from radiation"
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
the spread of a group of organisms into new habitats
a radial arrangement of nerve fibers connecting different parts of the brain
radiotherapy, radiation therapy, radiation, actinotherapy, irradiation(noun)
(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance
Kernerman English Learner's Dictionary
radiation(noun)ˌreɪ diˈeɪ ʃən
energy produced by a nuclear reaction
dangerous levels of radiation
radiationˌreɪ diˈeɪ ʃən
rays of energy produced by heat, light, etc.
cell phone radiation hazards
The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.
The process of radiating waves or particles.
The transfer of energy via radiation (as opposed to convection or conduction)
Origin: From radiatio.
the act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness
the shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat
U.S. National Library of Medicine
Emission or propagation of electromagnetic energy (waves/rays), or the waves/rays themselves; a stream of electromagnetic particles (electrons, neutrons, protons, alpha particles) or a mixture of these. The most common source is the sun.
The Standard Electrical Dictionary
The traveling or motion of ether waves through space. [Transcriber's note: The modern term corresponding to this definition is photons. The modern concept of radiation also includes particles-- neutrons, protons, alpha (helium) and beta (electrons) rays and other exotic items.]
Translations for radiation
Kernerman English Multilingual Dictionary
rays of light, heat etc or of any radioactive substance.
- radiaçãoPortuguese (BR)
- die AusstrahlungGerman
- प्रकाश या अन्य किरणों का विकिरणHindi
- radijacija, isijavanjeCroatian
- spinduliavimas, spinduliuotė, radiacijaLithuanian
- radiācija; starojumsLatvian
- pancaran radiasiMalay
- utstråling, strålingNorwegian
- وړانګى اچونه، پړ كيدنه، بريښدنه، ځلونهPashto
- 輻射Chinese (Trad.)
- випромінювання, радіаціяUkrainian
- sự tỏa chiếuVietnamese
- 辐射Chinese (Simp.)
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