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irradiation

[ih-rey-dee-ey-shuh n] /ɪˌreɪ diˈeɪ ʃən/
noun
1.
the act of irradiating.
2.
the state of being irradiated.
3.
intellectual or spiritual enlightenment.
4.
a ray of light; beam.
5.
Optics. the apparent enlargement of an object when seen against a dark background.
6.
the use of x-rays or other forms of radiation for the treatment of disease, the making of x-ray photographs, the manufacture of vitamin D, etc.
7.
exposure or the process of exposure to x-rays or other radiation.
8.
Physics. irradiance.
Origin of irradiation
1580-1590
First recorded in 1580-90, irradiation is from the Late Latin word irradiātiōn- (stem of irradiātiō). See ir-1, radiation
Related forms
postirradiation, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for irradiation
Contemporary Examples
Historical Examples
  • The phenomena of magnetism were ascribed by him to the irradiation of angels.

  • The force of the irradiation has been directly proportional with the squares of the distances.

    Eureka: Edgar A. Poe
  • However, is it not interesting to attribute the apparent movement to irradiation?

    Visual Illusions Matthew Luckiesh
  • That was charming and vivacious, and his smile was an irradiation.

    Crome Yellow Aldous Huxley
  • "Excuse me," he said with an irradiation of smiles, but yet with a kind of bewilderment.

    The Ball and The Cross G.K. Chesterton
  • The exceptionally acute psychiatrist Meynert shows how physiognomics depends on irradiation and parallel images.

    Criminal Psychology Hans Gross
  • Therefore we shall live for ever: and for ever show forth His praise and blaze out like the sun with the irradiation of His glory.

    Expositions of Holy Scripture

    Alexander Maclaren
  • It is classed as an effect of irradiation, and is caused by the sun shining through the depressions between the lunar mountains.

  • Now the optical law which most affects the technique of stained glass is that of which the effect is known as "irradiation."

British Dictionary definitions for irradiation

irradiation

/ɪˌreɪdɪˈeɪʃən/
noun
1.
the act or process of irradiating or the state of being irradiated
2.
the apparent enlargement of a brightly lit object when it is viewed against a dark background
3.
a shaft of light; beam or ray
4.
(med)
  1. the therapeutic or diagnostic use of radiation, esp X-rays
  2. exposure of a patient to such radiation
5.
another name for radiation, irradiance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for irradiation
n.

1580s, from French irradiation, from Latin *irradiationem, noun of action from past participle stem of irradiare (see irradiate). Originally of light (literally and figuratively); of X-rays, etc., from 1901.

Online Etymology Dictionary, © 2010 Douglas Harper
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irradiation in Medicine

irradiation ir·ra·di·a·tion (ĭ-rā'dē-ā'shən)
n.

  1. Exposure or subjection to the action of radiation for diagnostic or therapeutic purposes.

  2. Medical treatment by exposure to radiation.

  3. The spread of a nervous impulse beyond the usual path of conduction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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