radiation

4 definitions • 4 examples

a form of energy that comes from a nuclear reaction and that can be very dangerous to health:

Many servicemen suffered radiation sickness after the early atomic tests.

energy from heat or light that you cannot see:

microwave/ultraviolet/electromagnetic radiation

energy in the form of waves or particles (= any of the smallest pieces of matter that make up atoms):

Residents argued that electromagnetic radiation emitted by the radar towers might pose a health hazard.

(the sending out of) heat, light, or energy in waves:

solar radiation