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calcium carbonate

noun
1.
a white, crystalline, water-insoluble, tasteless powder, CaCO 3 , occurring in nature in various forms, as calcite, chalk, and limestone: used chiefly in dentifrices and polishes and in the manufacture of lime and cement.
Origin
1870-1875
1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for calcium carbonate
  • In reefs, all the builders die: the bricks are calcium carbonate shells.
  • The key ingredient is limestone, mostly calcium carbonate, the remains of shelled marine creatures.
  • Some formulations use calcium carbonate or even wood pulp instead.
  • Porcelain aids with drainage, and oyster shells bring calcium carbonate.
  • The team studied the saturation levels of aragonite, a form of calcium carbonate that drops as acidity of seawater rises.
  • The chalk is mostly calcium carbonate from coccoliths, the skeletal remains of plankton and algae.
  • In reefs, the structure is big lumps of calcium carbonate on which things grow and around which they graze and hunt.
  • Many species of invertebrate have shells or skeletons made of calcium carbonate.
  • So will corals, especially those whose skeletons are composed of aragonite, a particularly unstable form of calcium carbonate.
  • The three things were calcium carbonate which is sedimentary rock, iron oxide which is a component of igneous rock, and water.
British Dictionary definitions for calcium carbonate

calcium carbonate

noun
1.
a white crystalline salt occurring in limestone, chalk, marble, calcite, coral, and pearl: used in the production of lime and cement. Formula: CaCO3
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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calcium carbonate in Science
calcium carbonate  
A white or colorless crystalline compound occurring naturally in chalk, limestone, and marble and in the minerals calcite and aragonite. It is used to make toothpaste, white paint, and cleaning powder. Chemical formula: CaCO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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