Understudy definition, to learn (a role) in order to replace the regular actor or actress when necessary. See more.
Radiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.adiation. radiation. (Science: radiobiology) propagation of energy through space. In the context of this report, it is electromagnetic radiation (x-rays or gamma rays) or corpuscular radiation (alpha particles, electrons, protons, neutrons) capable of producing ionisation.
Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Radiation(noun) the act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness. 2  Radiation(noun) the shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.