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Merriam-Webster's Collegiate Dictionary ir·ra·di·ate (-at·ed ; -at·ing) ETYMOLOGY Latin irradiatus, past participle of irradiare, from in-+ radius ray DATE 1603 transitive verb 1. a. to cast rays of light upon : illuminate b. to enlighten intellectually or spiritually c. to affect or treat by radiant energy (as heat); specifically : to treat by irradiation 2. to emit like rays of light : radiate irradiating strength and comfort intransitive verb archaic : to emit rays : shine English Etymology irradiate irradiate (v.) c.1600, "to cast beams of light upon," from L. irradiatus, pp. of irradiare "shine forth," from in- "in" + radiare "to shine" (see radiate). Meaning "expose to radiation other than light" (originally x-rays) is from 1901. Oxford Advanced Learner's Dictionary-牛津双解-OALD7 irradiate ir·radi·ate / i5reidieit / verb[VN] 1. (technical 术语) to treat food with gamma radiation in order to preserve it 照射(食物以放射性处理,以便贮存) 2. ~ sth (with sth) (literary) to make sth look brighter and happier 使生辉；使焕发: faces irradiated with joy 一张张高兴得神采奕奕的面孔 • ir·radi·ation / i7reidi5eiFn / noun [U] Merriam-Webster's Collegiate Thesaurus-11th Edition v. Function: verb Synonyms: ILLUMINATE 2, edify, enlighten, illume, illumine, improve, upliftWebster's Third New International Dictionary, Unabridged ir·radiate I. \“+\ adjective Etymology: Latin irradiatus, past participle : made bright with or as if with light : illuminated < a countenance irradiate with love > II. \“+\ verb (-ed/-ing/-s) Etymology: Latin irradiatus, past participle of irradiare, from in- in- (II) + radiare to radiate — more at radiate transitive verb 1. a. : to throw rays of light upon : shine upon : illuminate , brighten < moonlight irradiating the placid water > b. : to enlighten intellectually or spiritually : make clear or brilliant < wisdom irradiated his counsel > c. : to affect or treat by radiant heat or other radiant energy; specifically : to treat by exposure to radiation (as of ultraviolet light or radium) 2. : to send forth like rays of light : radiate , shed , diffuse < irradiating strength and comfort > intransitive verb 1. archaic : to emit rays : shine 2. archaic : to issue in rays |
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