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dolomite Meaning, Definition & Usage

  1. noun a kind of sedimentary rock resembling marble or limestone but rich in magnesium carbonate
  2. noun a light colored mineral consisting of calcium magnesium carbonate; a source of magnesium; used as a ceramic and as fertilizer
    bitter spar.
WordNet

Dol"o*mite noun
Etymology
After the French geologist Dolomieu.
Definitions
  1. (Geol. & Min.) A mineral consisting of the carbonate of lime and magnesia in varying proportions. It occurs in distinct crystals, and in extensive beds as a compact limestone, often crystalline granular, either white or clouded. It includes much of the common white marble. Also called bitter spar.

Webster 1913