limestone

Plural: limestones

Noun

a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals
An abundant rock of marine and fresh-water sediments; primarily composed of calcite (CaCO₃); it occurs in a variety of forms, both crystalline and amorphous.

Examples

a limestone viaduct

Origin / Etymology

From lime + stone.

Synonyms

calcium carbonate, lime

Scrabble Score: 11

limestone: valid Scrabble (US) TWL Word
limestone: valid Scrabble Word in Merriam-Webster MW Dictionary
limestone: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 14

limestone: valid Words With Friends Word