| Noun | 1. | corpuscular radiation - a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons) alpha radiation, alpha ray - the radiation of alpha particles during radioactive decay neutron radiation - radiation of neutrons (as by a neutron bomb) radioactivity, radiation - the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay |