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subnuclear particle

[suhb-noo-klee-er, -nyoo- or, by metathesis, -kyuh-ler]
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noun Physics.
  1. any of the elementary particles, including those that do not exist in stable matter but appear as a result of high-energy collisions of other particles or nuclei.
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Origin of subnuclear particle

First recorded in 1960–65; sub- + nuclear

Pronunciation note

See nuclear.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018