rus: масса покоя

Information
has URI	http://lexvo.org/id/term/rus/%D0%BC%D0%B0%D1%81%D1%81%D0%B0%20%D0%BF%D0%BE%D0%BA%D0%BE%D1%8F

Meaning
means	(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 rest mass