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delta particle

noun, Physics.
any of a family of baryon resonances having strangeness 0, isotopic spin 3/2, and either a single or double positive electric charge, a single negative charge, or no charge. Symbol: Δ. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for delta particle

delta particle

(physics) a very short-lived hyperon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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