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rest masses

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rest mass

 
Use rest masses in a Sentence
–noun Physics.
the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body.

Origin:
1910–15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Medical Dictionary

rest mass n.
The physical mass of a body when it is regarded as being at rest.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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