calcium carbonate

noun

: 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

Examples of calcium carbonate in a Sentence

Recent Examples on the Web

Which is why Mack recommends products that have baking soda, calcium carbonate, or hydrated silica for a holistic alternative. —Essence, 8 May 2024

For about seven years, roughly half of the participants took 1,000 milligrams (mg) of calcium carbonate (which included 400 mg of elemental calcium) and 400 international units (IU) of vitamin D3, a form of vitamin D that humans produce naturally. —Maggie O'Neill, Health, 21 Mar. 2024

Word History

First Known Use

1868, in the meaning defined above

Kids Definition

calcium carbonate

noun

: a solid substance found in nature as limestone and marble and in plant ashes, bones, and shells and used especially in making lime and portland cement

Medical Definition

calcium carbonate

noun

: 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