irradiation

[ ih-rey-dee-ey-shuh n ]
/ ɪˌreɪ diˈeɪ ʃən /

noun


Nearby words

  1. irq,
  2. irra,
  3. irradiance,
  4. irradiant,
  5. irradiate,
  6. irradicable,
  7. irrational,
  8. irrational number,
  9. irrationalism,
  10. irrationality

Origin of irradiation

First recorded in 1580–90, irradiation is from the Late Latin word irradiātiōn- (stem of irradiātiō). See ir-1, radiation

Related formspost·ir·ra·di·a·tion, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irradiation


British Dictionary definitions for irradiation

irradiation

/ (ɪˌreɪdɪˈeɪʃən) /

noun

the act or process of irradiating or the state of being irradiated
the apparent enlargement of a brightly lit object when it is viewed against a dark background
a shaft of light; beam or ray
med
  1. the therapeutic or diagnostic use of radiation, esp X-rays
  2. exposure of a patient to such radiation
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

Word Origin and History for irradiation

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

Medicine definitions for irradiation

irradiation

[ ĭ-rā′dē-āshən ]

n.

Exposure or subjection to the action of radiation for diagnostic or therapeutic purposes.
Medical treatment by exposure to radiation.
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.