Dŏl'o-mīte, n.

n. (Geol. & Min.) A magnesian carbonate of lime, consisting, when pure, of 54.3 per cent. of carbonate of lime, and 45.7 of carbonate of magnesia. It occurs in extensive beds as a compact limestone, and also as a crystalline granular rock, either white or clouded. Much of the common white marble is dolomite. It is so called from the French geologist Dolomieu.