- to shed rays of light upon; illuminate.
- to illumine intellectually or spiritually.
- to brighten as if with light.
- to radiate (light, illumination, etc.).
- to heat with radiant energy.
- to treat by exposure to radiation, as of ultraviolet light.
- to expose to radiation.
- to emit rays; shine.
- to become radiant.
- irradiated; bright.
Origin of irradiate
- (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
Word Origin and History for irradiator
c.1600, "to cast beams of light upon," from Latin irradiatus, past participle of irradiare "shine forth," from assimilated form of in- "into, in" (see in- (2)) + radiare "to shine" (see radiate). Meaning "expose to radiation other than light" (originally X-rays) is from 1901. Related: Irradiated; irradiating.
- To expose to radiation, as for diagnostic or therapeutic purposes.
- To treat with radiation.
- To apply radiation to a structure or organism.
- 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.