rest mass

English Thesaurus

1. (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body (noun.attribute)

hypernym	:	mass,
definition	:	the property of a body that causes it to have weight in a gravitational field (noun.attribute)

domain category	:	natural philosophy, physics,
definition	:	the science of matter and energy and their interactions (noun.cognition)