Dictionary.com

Popular Searches

 Thesaurus.com

sigma particle

American  

noun

Physics.

  1. an unstable hyperon having positive, negative, or zero electric charge and strangeness −1. Σ

Etymology

Origin of sigma particle

First recorded in 1960–65

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.