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irradiate (v.)

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

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Definitions of irradiate

irradiate (v.)
give spiritual insight to; in religion;
Synonyms: enlighten
irradiate (v.)
cast rays of light upon;
irradiate (v.)
expose to radiation;
irradiate food
Synonyms: ray
From wordnet.princeton.edu