irradiate

[ verb ih-rey-dee-eyt; adjective ih-rey-dee-it, -eyt ]
/ verb ɪˈreɪ diˌeɪt; adjective ɪˈreɪ di ɪt, -ˌeɪt /

verb (used with object), ir·ra·di·at·ed, ir·ra·di·at·ing.

verb (used without object), ir·ra·di·at·ed, ir·ra·di·at·ing.

Archaic.
  1. to emit rays; shine.
  2. to become radiant.

adjective

irradiated; bright.

RELATED WORDS


Nearby words

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

Origin of irradiate

1595–1605; < Latin irradiātus, past participle of irradiāre to shine upon. See ir-1, radiate

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

Examples from the Web for irradiate


British Dictionary definitions for irradiate

irradiate

/ (ɪˈreɪdɪˌeɪt) /

verb

(tr) physics to subject to or treat with light or other electromagnetic radiation or with beams of particles
(tr) to expose (food) to electromagnetic radiation to kill bacteria and retard deterioration
(tr) to make clear or bright intellectually or spiritually; illumine
a less common word for radiate (def. 1)
(intr) obsolete to become radiant
Derived Formsirradiative, adjectiveirradiator, noun

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 irradiate

irradiate

v.

c.1600, "to cast beams of light upon," from Latin irradiatus, past participle of irradiare "shine forth," from assimilated form of in- "into, in" (see in- (2)) + radiare "to shine" (see radiate). Meaning "expose to radiation other than light" (originally X-rays) is from 1901. Related: Irradiated; irradiating.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for irradiate

irradiate

[ ĭ-rādē-āt′ ]

v.

To expose to radiation, as for diagnostic or therapeutic purposes.
To treat with radiation.
To apply radiation to a structure or organism.

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

Science definitions for irradiate

irradiate

[ ĭ-rādē-āt′ ]

To expose to or treat with radiation. For example, meat sold as food is often irradiated with x-rays or other radiation to kill bacteria; uranium 238 can be irradiated with neutrons to create fissionable plutonium 239.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.