D particle
Americannoun
Physics.
D particle
Scientific
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Either of two subatomic particles in the meson family, one neutral and one positively charged, having masses 3,649 and 3,658 times that of the electron and average lifetimes of 4.2 × 10 - 13 and 1.1 × 10 - 12 seconds, respectively.
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See Table at subatomic particle
Etymology
Origin of D particle
First recorded in 1975–80
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.
