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.

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

British Dictionary definitions for irradiator

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 Forms

irradiative, 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

Medicine definitions for irradiator

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 irradiator

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.