- a very common mineral, calcium magnesium carbonate, CaMg(CO3)2, occurring in crystals and in masses.
- a rock consisting essentially or largely of this mineral.
Origin of dolomite
1785–95; < French, named after D. de Dolom(ieu) (1750–1801), French mineralogist; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for dolomite
As a dolomite the stone is far more resistant than a purer limestone.History of Linn County Iowa
Luther A. Brewer
Part of the Houses of Parliament at Westminster is built of dolomite.
He's got to stare down her throat, to watch where the dolomite lands.
There was a lot of dolomite and old fine cinder, very dusty, but not hot.
"All right," I said, and picked up a shovel from the dolomite pile.
- a white mineral often tinted by impurities, found in sedimentary rocks and veins. It is used in the manufacture of cement and as a building stone (marble). Composition: calcium magnesium carbonate. Formula: CaMg(CO 3) 2 . Crystal structure: hexagonal (rhombohedral)
- a sedimentary rock resembling limestone but consisting principally of the mineral dolomite. It is an important source of magnesium and its compounds, and is used as a building material and refractory
C18: named after Déodat de Dolomieu (1750–1801), French mineralogist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for dolomite
1794, named for French geologist Déodat De Gratet De Dolomieu (1750-1801) who described the rock in his study of the Alps (1791).
Online Etymology Dictionary, © 2010 Douglas Harper
- A gray, pink, or white rhombohedral mineral. Dolomite occurs in curved saddlelike crystals with a pearly to glassy luster. It is a common rock-forming mineral. Chemical formula: CaMg(CO3)2.
- A sedimentary rock containing more than 50 percent of the mineral dolomite by weight.
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