limestone
An abundant rock of marine and freshwater sediments; primarily composed of calcite (CaCO3); and occurring in a variety of forms, both crystalline and amorphous.
Example
“a limestone viaduct”
Synonyms
- lime
- calcium carbonate
Where this comes from
This definition is adapted from “limestone” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.