cal·​cite | \ ˈkal-ˌsīt How to pronounce calcite (audio) \

Definition of calcite

: a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal form and including common limestone, chalk, and marble — compare aragonite

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Other Words from calcite

calcitic \ kal-​ˈsi-​tik How to pronounce calcitic (audio) \ adjective

Examples of calcite in a Sentence

Recent Examples on the Web In a third cave, located in the far south, curtainlike calcite formations were decorated in shades of scarlet. Kate Wong, Scientific American, "Ancient Cave Paintings Clinch the Case for Neandertal Symbolism," 23 Feb. 2018 Interestingly, marble is a composite of a variety of minerals, including calcite, graphite, and more. Hadley Mendelsohn, House Beautiful, "How to Pick the Right Kitchen Countertop Material, According to Experts," 6 Sep. 2019 There was even a section where the guide turned on a blacklight to make the calcite and iron glow for a second. Chelsey Lewis, Milwaukee Journal Sentinel, "Too much cheese at Lambeau and more hilarious one-star ratings of popular Wisconsin attractions," 13 Aug. 2019 This calcite formation looks like strips of the favorite breakfast meat. Mike Morris, Los Angeles Times, "Exploring Calaveras County caves keeps you cool, puts your imagination in high gear," 27 July 2019 Calcium carbonate, for example, which consists of one part calcium, one part carbon, and three parts oxygen, can assemble into several different minerals, including calcite and aragonite. Sophia Chen, WIRED, "New Analysis Techniques Unearth a Trove of Unusual Minerals," 1 July 2019 Uranium-thorium dating of the calcite that had run over the art (a red dot, a red ladder, a red hand-stencil) showed this art to have been made, there in the darkness, around 65,000 years BP. Tobias Carroll, Longreads, "‘The Underland Is a Deeply Human Realm’: Getting Down with Robert Macfarlane," 20 June 2019 Cordierite proved to be the most accurate sunstone for navigation while the calcite had the worst performance. Jason Daley, Smithsonian, "Simulation Suggests Viking Sunstones of Legend Could Have Worked," 9 Apr. 2018 Sandy Beaches In and of themselves, coral reefs are extraordinary living structures: vast calcite scaffolds constructed by billions of tiny polyps. National Geographic, "6 Amazing Structures Built by Surprising Creatures," 7 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'calcite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of calcite

1840, in the meaning defined above

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Time Traveler for calcite

Time Traveler

The first known use of calcite was in 1840

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Statistics for calcite

Cite this Entry

“Calcite.” The Dictionary, Merriam-Webster Inc., Accessed 12 December 2019.

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More Definitions for calcite


cal·​cite | \ ˈkal-ˌsīt How to pronounce calcite (audio) \

Medical Definition of calcite

: a mineral CaCO3 consisting of calcium carbonate crystallized in hexagonal form and including common limestone, chalk, and marble

Other Words from calcite

calcitic \ kal-​ˈsit-​ik How to pronounce calcitic (audio) \ adjective

More from Merriam-Webster on calcite

Rhyming Dictionary: Words that rhyme with calcite Encyclopedia article about calcite

Comments on calcite

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a period of high artistic development

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