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dolomite

[doh-luh-mahyt, dol-uh-] /ˈdoʊ ləˌmaɪt, ˈdɒl ə-/
noun
1.
a very common mineral, calcium magnesium carbonate, CaMg(CO 3) 2 , occurring in crystals and in masses.
2.
a rock consisting essentially or largely of this mineral.
Origin
1785-1795
1785-95; < French, named after D. de Dolom(ieu) (1750-1801), French mineralogist; see -ite1
Related forms
dolomitic
[dol-uh-mit-ik] /ˌdɒl əˈmɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for dolomite
  • Karst is the geologic term for landscapes formed mainly by the dissolving of limestone or dolomite bedrock.
  • The fear is that the acid water will start flooding the caves and destroy their dolomite rock.
  • Generally, this rock is made of limestone or dolomite, both of which are easily dissolved by seeping groundwater.
  • The rhombic dolomite faces are often covered with a thin film of pyrobitumen.
  • dolomite is not only harder than regular limestone, it also can't be dissolved by slightly acidic rainwater.
  • The dolomite units are restricted to the northern part of the state.
  • Many of the more durable hoodoos are capped with a special kind of magnesium-rich limestone called dolomite.
  • Supply of high-purity limestone and dolomite suitable for specialty uses is limited in many geographic areas.
  • Shallow groundwater flows through a fractured dolomite aquifer.
British Dictionary definitions for dolomite

dolomite

/ˈdɒləˌmaɪt/
noun
1.
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(CO3)2. Crystal structure: hexagonal (rhombohedral)
2.
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
Derived Forms
dolomitic (ˌdɒləˈmɪtɪk) adjective
Word Origin
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
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Word Origin and History for dolomite
n.

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
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dolomite in Science
dolomite
  (dō'lə-mīt', dŏl'ə-mīt')   
  1. 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.

  2. A sedimentary rock containing more than 50 percent of the mineral dolomite by weight.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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