radioactivity 1
noundomain: natural proc.
Princeton WordNet [ver.3.1]
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EnglishDefinition
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Hypernym
emission 3
noun
the release of electrons from parent atoms
EnglishDerivationally related form
radioactive 1
adjective
exhibiting or caused by radioactivity
Hyponym
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)
