noun
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) (Freq. 2)
• Syn: ↑particulate radiation
• Hypernyms: ↑radiation, ↑radioactivity
• Hyponyms: ↑alpha radiation, ↑alpha ray, ↑beta radiation, ↑beta ray, ↑electron radiation, ↑neutron radiation
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Physics, Astron.
radiation consisting of atomic and subatomic particles, as alpha particles, beta particles, and neutrons.
Useful english dictionary. 2012.