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Dictionary

del'ta par"ticle

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

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

delta iron

delta ray

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