calcite

noun
cal·​cite | \ˈkal-ˌsīt \

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 \ adjective

Examples of calcite in a Sentence

Recent Examples on the Web

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 No calcite, cordierite, or tourmaline crystal has turned up at a Viking archaeological site so far. Kiona N. Smith, Ars Technica, "Mysterious sunstones in medieval Viking texts could really have worked," 6 Apr. 2018 All three types of crystals that the team studied—calcite, a form of calcium carbonate; cordierite, an iron- and magnesium-rich silicate; and tourmaline, a boron-rich silicate—worked well at intervals of 3 hours or less. Sid Perkins, Science | AAAS, "Viking seafarers may have navigated with legendary crystals," 3 Apr. 2018 Multiple translucent crystals fit the bill, namely calcite, cordierite and tourmaline. Steph Yin, New York Times, "The Crystals That May Have Helped Vikings Navigate Northern Seas," 6 Apr. 2018 Archaeologists and historians now think the Viking solar stones might actually have been a mineral called calcite, or Icelandic spar, which has a crystal structure that polarizes light. Kiona N. Smith, Ars Technica, "Mysterious sunstones in medieval Viking texts could really have worked," 6 Apr. 2018 The Danish archaeologist Thorkild Ramskou suggested in 1967 that these sunstones of legend might in fact have been Icelandic spar, a transparent form of calcite that is commonly found in Norway. David Grossman, Popular Mechanics, "Vikings Could Have Used Crystals For Navigation," 4 Apr. 2018 As expected, the acid dissolved the calcite, leaving nothing but a weakened black sponge full of micropores. Laura G. Shields, Science | AAAS, "Did air pollution cause a deadly Chinese landslide?," 12 Dec. 2017 Several minerals redirect light from the sun, including calcite, agate and fluorite. Nola Taylor Redd, Smithsonian, "Could We See Glow-in-the-Dark Aliens From Earth?," 1 Aug. 2017

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

The first known use of calcite was in 1840

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More Definitions for calcite

calcite

noun
cal·​cite | \ˈkal-ˌsīt \

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 \ adjective

More from Merriam-Webster on calcite

Rhyming Dictionary: Words that rhyme with calcite

Britannica.com: Encyclopedia article about calcite

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