Dolomite
Pronunciation : Dol"o*mite
Part of Speech : n.
Etymology : [After the French geologist Dolomieu.] (Geol. & Min.)
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913