Dictionary
alpha particle
noun
Definition of ALPHA PARTICLE
: a positively charged nuclear particle identical with the nucleus of a helium atom that consists of two protons and two neutrons and is ejected at high speed in certain radioactive transformations —called also alpha, alpha radiation, alpha ray
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First Known Use of ALPHA PARTICLE
1903
Rhymes with ALPHA PARTICLE
Medical Dictionary
alpha particle
noun
Medical Definition of ALPHA PARTICLE
: a positively charged nuclear particle identical with the nucleus of a helium atom that consists of two protons and two neutrons and is ejected at high speed in certain radioactive transformations—called also alpha, alpha ray
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