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B particle

American  

noun

Physics.

  1. B meson.

B particle Scientific  

  1. Either of two subatomic particles in the meson family, one neutral and one positively charged, both of which have masses 10,331 times that of an electron and average lifetimes of 1.6 × 10 - 12 seconds. B particles contain bottom quarks.

  2. See Table at subatomic particle

Etymology

Origin of B particle

First recorded in 1965–70

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.