radiation
Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
Related to radiation: electromagnetic radiation, Radiation poisoning
ra·di·a·tion
(rā′dē-ā′shən)n.
1. The act or process of radiating: the radiation of heat and light from a fire.
2. Physics
a. Emission or propagation of energy in the form of waves or particles.
b. Energy radiated or transmitted in the form of waves or particles.
c. A stream of particles or electromagnetic waves emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.
3.
a. The act of exposing or the condition of being exposed to such energy.
b. The application of such energy, as in medical treatment.
4. Anatomy Radial arrangement of parts, as of a group of nerve fibers connecting different areas of the brain.
5. Adaptive radiation
ra′di·a′tion·al, ra′di·a′tive adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
radiation
(ˌreɪdɪˈeɪʃən)n
1. (General Physics) 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. (Medicine) med Also called: radiation therapy treatment using a radioactive substance
3. (Anatomy) anatomy a group of nerve fibres that diverge from their common source
4. (Biology) See adaptive radiation
5. the act, state, or process of radiating or being radiated
6. (Surveying) surveying the fixing of points around a central plane table by using an alidade and measuring tape
ˌradiˈational adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ra•di•a•tion
(ˌreɪ diˈeɪ ʃən)n.
1.
a. the process in which energy is emitted as particles or waves.
b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body.
c. the energy transferred by these processes.
2. the act or process of radiating.
3. something that is radiated.
4. radial arrangement of parts.
ra`di•a′tion•al, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
As the nucleus of a radioactive element decays, it releases alpha particles, beta particles, or gamma rays. Alpha rays (a stream of alpha particles) are the weakest form of radiation and can be stopped by paper. Beta rays (a stream of beta particles) are able to pass through paper but not through aluminum. Gamma rays (a form of electromagnetic radiation) are the strongest. They are able to pass through paper and aluminum, but not through a block of lead or concrete.
ra·di·a·tion
(rā′dē-ā′shən)1.
a. Energy in the form of electromagnetic waves or streams of particles, such as photons or electrons. Radiation is given off by nuclear reactions (as in fission) and by radioactive decay.
b. The emission or movement of such energy through space or a medium, such as air. See Notes at conduction, electromagnetic radiation.
2. The use of such energy, especially x-rays, in medical diagnosis and treatment.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Radiation
See also physics.
radiotherapy.
the record produced by a bolometer.
a device used in bolometry.
the measurement of minute amounts of radiant energy, especially infrared spectra. — bolometrist, n. — bolometric, adj.
radioscopy.
the capacity to transmit infrared radiation. — diathermanous, adj.
a device, carried or worn by people working near radiation for measuring the amount of radiation to which they are exposed.
the measurement by a dosimeter of the dosage of radiation a person might have received. See also drugs. — dosimetrist, n. — dosimetric, dosimetrical adj.
an instrument for measuring the emission of radiation in the form of visible light and identifying the substance that is its source. — fluorometric, adj.
the measurement of fluorescence, or visible radiation, by means of a fluorometer. — fluorometric, adj.
an examination by means of a screen coated with a fluorescent substance responsive to radiation from x rays. — fluoroscopic, adj.
the study of metals and their structures and properties by the use of microscopy and x rays.
the science or technique of making x-ray photographs of the kidneys, renal pelves, and ureters, using injection of opaque solutions or radiopaque dyes. — pyelographic, adj.
the sensitivity of some humans to radiation of various kinds, as in water divining or nonmedical diagnosis. — radiesthetic, adj.
the state, property, or process of being radioactive.
the production of photographic images on film using radiation from other radioactive substances instead of light. Also called x-ray scotography, shadowgraphy. — radiograph, radiographer, n. — radiographic, radiographical, adj.
1. the science that studies x rays or radiation from radioactive substances, esp. for medical purposes.
2. the examination or photographing of parts of the body with such rays.
3. the interpretation of the resulting photographs. — radiologist, n. — radiologie, radiological, adj.
2. the examination or photographing of parts of the body with such rays.
3. the interpretation of the resulting photographs. — radiologist, n. — radiologie, radiological, adj.
the study of metals and their structures by the use of x rays.
the study or observation of the inner structure of opaque materials by means of x rays or other radioactive substances. Also called curiescopy.
sensitivity to the effects of radiation, as of parts of the body. Also called radiosensitivity.
radiosensibility. — radiosensitive, adj.
the science and technology of applying radiation and x rays to industrial use. See also radio.
a method of treating diseases with x rays or the radiation from other radioactive substances. Also called actinotherapy. — radiotherapist, n. — radiotherapeutic, adj.
1. the treatment of disease with x rays or roentgen rays.
2. the effect of misuse or overexposure to these rays.
2. the effect of misuse or overexposure to these rays.
an x-ray photograph.
x-ray photography.
a radiograph.
radiography.
x-ray photography of a selected plane of the body by a method that eliminates the outline of structures in other planes. — tomographic, adj.
a process of recording x-ray images by electrostatic means. — xeroradiographic, adj.
radiography.
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
radiation
Electromagnetic and radioactive energy emitted as rays, waves, or particles.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Switch to new thesaurus
| Noun | 1. |  radiation - energy that is radiated or transmitted in the form of rays or waves or particlesionizing radiation - high-energy radiation capable of producing ionization in substances through which it passes cosmic radiation - radiation coming from outside the solar system electromagnetic radiation, electromagnetic wave, nonparticulate radiation - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge energy, 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" solar radiation - radiation from the sun |
| 2. | radiation - the act of spreading outward from a central source bombardment - the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | |
| 3. | radiation - 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" syndrome - a pattern of symptoms indicative of some disease | |
| 4. | radiation - the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay corpuscular radiation, particulate radiation - a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons) emission - the release of electrons from parent atoms | |
| 5. | radiation - the spread of a group of organisms into new habitats adaptive radiation - the development of many different forms from an originally homogeneous group of organisms as they fill different ecological niches natural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" | |
| 6. | radiation - a radial arrangement of nerve fibers connecting different parts of the brain neural structure - a structure that is part of the nervous system | |
| 7. |  radiation - (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substancetherapy - (medicine) the act of caring for someone (as by medication or remedial training etc.); "the quarterback is undergoing treatment for a knee injury"; "he tried every treatment the doctors suggested"; "heat therapy gave the best relief" phototherapy - the use of strong light to treat acne or hyperbilirubinemia of the newborn Curietherapy, radium therapy - the use of radium in radiation therapy X-ray therapy - the therapeutic use of X rays medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques |
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
radiation
noun emission, rays, emanation They study energy radiation from the most violent stars in the universe.
Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002
Translations
إِشْعَاعإشْعاع
radiacevyzařování
stråling
säteily
radijacijazračenje
geislun
放射
복사
vyžarovanie
sevanje
strålning
รังสี
sự bức xạ
radiation
[ˌreɪdɪˈeɪʃən]A. N → radiación f
B. CPD radiation sickness N → enfermedad f por radiación
radiation therapy N → radioterapia f, terapia f por radiaciones
radiation treatment N → tratamiento m por radiaciones
radiation therapy N → radioterapia f, terapia f por radiaciones
radiation treatment N → tratamiento m por radiaciones
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
radiation
[ˌreɪdiˈeɪʃən] n
(from the sun, electronic equipment, nuclear bombs) → radiations fpl
Can the radiation from mobile phones be harmful to humans? → Les radiations des téléphones portables sont-elles nocives?
Can the radiation from mobile phones be harmful to humans? → Les radiations des téléphones portables sont-elles nocives?
[heat, energy] → rayonnement m
(also radiation therapy) → radiothérapie f
modif [exposure] → aux radiations; [leak] → de radiations
radiation levels → niveaux mpl de radiationradiation sickness n → mal m des rayonsradiation treatment n → radiothérapie f
radiation levels → niveaux mpl de radiationradiation sickness n → mal m des rayonsradiation treatment n → radiothérapie f
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
radiation
n (of heat etc) → (Aus)strahlung f; (= rays) → radioaktive Strahlung; contaminated by or with radiation → verstrahlt, strahlenverseucht; exposure to radiation → Strahlenbelastung f; radiation level → Strahlenbelastung f; radiation therapy or treatment → Strahlenbehandlung f; radiation damage/injuries → Strahlenschäden pl
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
radiate
(ˈreidieit) verb1. to send out rays of (light, heat etc). A fire radiates heat.
2. to go out or be sent out in rays, or in many directions from a central point. Heat radiates from a fire; All the roads radiate from the centre of the town.
ˌradiˈation noun rays of light, heat etc or of any radioactive substance.
ˈradiator noun1. a type of apparatus for heating a room.
2. an apparatus in a car which, with a fan, cools the engine.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
radiation
→ إِشْعَاع radiace stråling Strahlung ακτινοβολία radiación säteily rayonnement radijacija radiazione 放射 복사 straling stråling promieniowanie radiação радиация strålning รังสี radyasyon sự bức xạ 辐射Multilingual Translator © HarperCollins Publishers 2009
ra·di·a·tion
n. radiación.
1. emisión de materiales o partículas radioactivas;
2. propagación de energía;
3. emisión de rayos desde un centro común;
___ dosage → dosis de ___;
___ hazards → riesgos y peligros causados por una ___;
___ therapy → radioterapia;
electromagnetic ___ → ___ electromagnética;
infrared ___ → ___ por rayos infrarrojos;
ionizing ___ → ___ ionizante;
ultraviolet ___ → ___ de rayos ultravioleta.
English-Spanish Medical Dictionary © Farlex 2012
radiation
n radiación f; ionizing — radiación ionizanteEnglish-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.