v.
Pronunciation: i- ' r ā -d ē - ˌ ā t
Function: verb
Inflected Form: -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
– ir · ra · di · a · tive \ - ˌ ā -tiv \ adjective
– ir · ra · di · a · tor \ - ˌ ā -t ə r \ noun