limestone Meaning, Definition & Usage

  1. noun a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals

WordNet


Lime"stone` noun
Definitions
  1. A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble.

Webster 1913