dolomite

noun

do·​lo·​mite ˈdō-lə-ˌmīt 

ˈdä-

1

: a mineral CaMg(CO₃)₂ consisting of a calcium magnesium carbonate found in crystals and in extensive beds as a compact limestone

2

: a limestone or marble rich in magnesium carbonate

dolomitic

ˌdō-lə-ˈmi-tik 

ˌdä-

adjective

Examples of dolomite in a Sentence

Recent Examples on the Web

This architectural marvel, constructed from natural dolomite lime, curves elegantly across a deep gorge and leads straight into a tunnel cut into solid rock. — Taryn White, Travel + Leisure, 4 May 2026

For a longer jaunt, try the six-mile Fall Canyon trek, which weaves through a less-trodden corner of the park, via Titus Canyon, en route to the Fall Canyon Narrows, where towering striated walls of black dolomite and limestone surround you. — Stephanie Vermillion, Travel + Leisure, 8 Mar. 2026

Carbonates, which include calcite, dolomite, aragonite, magnesite, and siderite, are formed by ions of carbon and oxygen dissolved in water that react with metal ions. — New Atlas, 12 July 2025

Yet scientists have failed to grow significant amounts of dolomite in the laboratory. — David Bressan, Forbes.com, 8 Apr. 2025

Word History

Etymology

French, from Déodat de Dolomieu †1801 French geologist

First Known Use

1794, in the meaning defined at sense 1

Rhymes for dolomite

• acolyte
• aconite
• allanite
• alunite
• amberlite
• ammonite
• amorite
• amphitrite
• analyte
• anchorite
• andesite
• anhydrite

Kids Definition

dolomite

noun

do·​lo·​mite ˈdō-lə-ˌmīt 

ˈdäl-ə-

: a mineral found in broad layers as a compact limestone