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calcium carbonate

noun

Definition of calcium carbonate

: a compound CaCO₃ found in nature as calcite and aragonite and in plant ashes, bones, and shells and used especially in making lime and portland cement and as a gastric antacid

Recent Examples on the Web

//Your husband is correct that eggshells are a good source of calcium carbonate, according to at least one random health website.
— John Hodgman, New York Times, "Judge John Hodgman on Eating Unpeeled Eggs," 31 Oct. 2019
//Like the Yoga Skeletons that came before them, the Selfie Skeletons were created by Ashland home decor, and are made from calcium carbonate and resin.
— Hannah Chubb, PEOPLE.com, "Spooky and Cute! These 'Selfie Skeletons' Are the Most 2019 Halloween Decorations Out There," 11 Sep. 2019
//Corals, like many marine species, protect themselves with skeletons made from calcium carbonate.
— Ashley Strickland, CNN, "Scientists studied 2,500 coral reefs to figure out how to save them," 12 Aug. 2019
//Kayak through the General Carrera Lake’s Marble Chapels, a network of glacial caves veined with blue striations carved from calcium carbonate by over 6,000 years of water pressure.
— National Geographic, "Take the perfect road trip at the bottom of the world," 5 July 2019
//Corals, like many marine species, protect themselves with skeletons made from calcium carbonate.
— Ashley Strickland, CNN, "Scientists studied 2,500 coral reefs to figure out how to save them," 12 Aug. 2019
//But early research indicates that calcium carbonate, a common mineral dust, might actually help restore the ozone layer while reflecting some sunlight back into space.
— John Fialka, Scientific American, "Risks of Controversial Geoengineering Approach “May Be Overstated”," 3 July 2019
//Corals, like many marine species, protect themselves with skeletons made from calcium carbonate.
— Ashley Strickland, CNN, "Scientists studied 2,500 coral reefs to figure out how to save them," 12 Aug. 2019
//Using eggshells — which are primarily made of calcium carbonate — to prompt bone growth also provides a sustainable way to reuse them while advancing the technology behind these procedures, according to the researchers.
— Maysoon Khan, BostonGlobe.com, "Using eggshells to grow new bone," 24 July 2019

First Known Use of calcium carbonate

1868, in the meaning defined above

Dictionary Entries near calcium carbonate

calcium channel blocker

calcium chloride

calcium citrate

More Definitions forcalcium carbonate

calcium carbonate

noun

Kids Definition of calcium carbonate

: a solid substance that is found as limestone and marble and in plant ashes, bones, and shells

calcium carbonate

noun

Medical Definition of calcium carbonate

: a calcium salt CaCO₃ that is found in limestone, chalk, marble, plant ashes, bones, and many shells, that is obtained also as a white precipitate by passing carbon dioxide into a suspension of calcium hydroxide in water, and that is used in dentifrices and in pharmaceuticals as an antacid and to supplement bodily calcium stores