rest mass
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Definition(s):
- (n) (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body
Usage(s):
- Thus, because it could never stop, its rest mass was irrelevant and could indeed be an imaginary number.
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/ɪn ˈsɛn di ɛ ri /
/ɪn ˈsɛn di ɛ ri /