to expose (food) to electromagnetic radiation in order to kill bacteria and prolong its shelf life
to cast rays of light on (something)
to emit (something resembling that can be likened to rays of light)
literary to give intellectual or spiritual insight to (somebody)
irradiance noun
irradiant adj
irradiation noun
irradiative /-tiv/ adj
irradiator noun
[Latin irradiatus, past part. of irradiare to shine upon, from in-2 + radiare: see radiate1]