Stereometer \Ste`re*om"e*ter\, n. [Stereo- + meter.] (Physics) 1. An instrument for measuring the solid contents of a body, or the capacity of a vessel; a volumenometer. [1913 Webster] 2. An instrument for determining the specific gravity of liquid bodies, porous bodies, and powders, as well as solids. [1913 Webster] Stereometric