calcite

noun

cal·​cite ˈkal-ˌsīt 

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

calcitic

kal-ˈsi-tik 

adjective

Examples of calcite in a Sentence

Recent Examples on the Web

That process is called carbonation, in which carbon dioxide from the air seeps into the concrete and reacts with calcium-rich compounds, leaving behind calcite, a hard crystalline mineral. — Sam MacDonald, Scientific American, 11 July 2026

Air exposure caused the concrete to form the mineral calcite by reacting with carbon dioxide. — Georgina Jedikovska, Interesting Engineering, 3 July 2026

The interiors feature blue calcite marble in the bathrooms, dark ebony wood and leather accents in the main area, and in-room amenities including Bang & Olufsen speakers and Byredo toiletries. — Condé Nast, Condé Nast Traveler, 16 May 2026

Rock formations with evocative names—boxwork, calcite rafts, dogtooth spar, frostwork—add glorious texture to the underground maze. — Robert Annis, Midwest Living, 14 May 2026

Word History

First Known Use

1840, in the meaning defined above

Rhymes for calcite

• affright
• airtight
• albite
• alight
• alright
• aplite
• aright
• bainite
• birthright
• bobwhite
• bornite
• bullfight

Kids Definition

calcite

noun

cal·​cite ˈkal-ˌsīt 

: a mineral substance made up of calcium carbonate and found in numerous forms including limestone, chalk, and marble

calcitic

kal-ˈsit-ik 

adjective

Medical Definition

calcite

noun

cal·​cite ˈkal-ˌsīt 

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

calcitic

kal-ˈsit-ik 

adjective