D defs.my
Entry 1 sense Webster, 1913

Calcite

/(kăl"sīt)/ · Cal·cite · IPA /ˈkælˌsaɪt/
01 n. Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes com…
  1. 1.
    Calcium carbonate, or carbonate of lime. It is rhombohedral in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.(Min.) Also: calc-spar, calcareous spar