Plas"ma (?), n. [See Plasm.] 1. (Min.) A variety of quartz, of a color
between grass green and leek green, which is found associated with
common chalcedony. It was much esteemed by the ancients for making
engraved ornaments.
2. (Biol.) The viscous material of an animal or vegetable cell, out of
which the various tissues are formed by a process of differentiation;
protoplasm.