the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body.
the mass of an object that is at rest relative to an observer. It is the mass used in Newtonian mechanics
rest mass n.
The physical mass of a body when it is regarded as being at rest.
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.
noun (pl) restos 1. (Austral, informal) a restored antique, vintage car, etc noun the remainder, rest Word Origin Ital
verb (used with or without object) 1. to stock again; replenish. verb 1. to replenish stores or supplies
noun 1. James (Barrett) (“Scotty”) 1909–1995, U.S. journalist, born in Scotland.
verb (used with object), restored, restoring. 1. to bring back into existence, use, or the like; reestablish: to restore order. 2. to bring back to a former, original, or normal condition, as a building, statue, or painting. 3. to bring back to a state of health, soundness, or vigor. 4. to put back to a […]