. . . "0"^^ . . . "(physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body"@en-us . . . . "0"^^ . "05024931-n"^^ . "rest mass"@en-us . . . "103923849"@en-us . . . "rest mass"^^ . "105024931"^^ . "104757588"@en-us .