ir·ra·di·ate 
(
ĭ-r
ād
ē-
āt
′)
v. ir·ra·di·at·ed, ir·ra·di·at·ing, ir·ra·di·ates
v.tr.1. a. To expose to radiation.
b. To treat with radiation: irradiate farm produce so as to destroy bacteria.
2. To shed light on; illuminate.
3. To manifest in a manner suggesting the emission of light; radiate: irradiate goodness.
v.intr. Archaic 1. To send forth rays; radiate.
2. To become radiant.
[Latin irradiāre, irradiāt-, to illuminate : in-, on; see IN-2 + radiāre, to shine; see RADIATE.]
ir·radi·a′tive adj.
ir·radi·a′tor n.