"A physical quality which inheres in a bearer by virtue of some influence is exerted by the bearer's mass per unit size."^^ . . . "mass density" . . . "density" . "density"^^ . . "PATO:0001019"^^ . "mass density"^^ . "quality"^^ . "A physical quality which inheres in a bearer by virtue of some influence is exerted by the bearer's mass per unit size." . .