rest mass
the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body.
Origin of rest mass
1- Compare relativistic mass.
Words Nearby rest mass
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use rest mass in a sentence
It would have produced ten thousand million times as much energy as the total disintegration of the rest mass would have produced!
Hanging by a Thread | Gordon Randall Garrett
British Dictionary definitions for rest mass
the mass of an object that is at rest relative to an observer. It is the mass used in Newtonian mechanics
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for rest mass
In Special and General Relativity, the observed mass of a body that is not in motion with respect to the observer. Also called invariant mass Compare relativistic mass.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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