dolomite
Americannoun
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a very common mineral, calcium magnesium carbonate, CaMg(CO3 ) 2 , occurring in crystals and in masses.
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a rock consisting essentially or largely of this mineral.
noun
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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)
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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
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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(CO 3 ) 2 .
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A sedimentary rock containing more than 50 percent of the mineral dolomite by weight.
Other Word Forms
Etymology
Origin of dolomite
1785–95; < French, named after D. de Dolom ( ieu ) (1750–1801), French mineralogist; see -ite 1
Vocabulary lists containing dolomite
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Solving the Dolomite Problem does more than explain a geological mystery.
From Science Daily • Apr. 20, 2026
The move left some users who had deposited stablecoins in Dolomite unable to make full withdrawals.
From The Wall Street Journal • Apr. 14, 2026
Events are spread over hundreds of miles of northern Italy, in locations including the Alps and Dolomite mountains.
From BBC • Feb. 7, 2026
The Games will be spread across seven venues throughout northeastern Italy and a second Olympic cauldron will be lit in Cortina d'Ampezzo in the Dolomite mountains.
From Barron's • Feb. 5, 2026
He looked across the deep valley of the Adige, nearly four thousand feet below him, to the giant range of the Dolomite Alps on the eastern side.
From Delia Blanchflower by Ward, Humphry, Mrs.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
