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radioactivity

DEFINITIONS OF: radioactivity

1

n the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

Synonyms:
radiation
Types:
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corpuscular radiation, particulate 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
beta radiation, beta ray, electron radiation
radiation of beta particles during radioactive decay
neutron radiation
radiation of neutrons (as by a neutron bomb)
Type of:
emission
the release of electrons from parent atoms
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