(n.) 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's Revised Unabridged Dictionary
| APA | Webster's. (2011). limestone. Retrieved September 21, 2026, from http://smartdefine.org/limestone/definitions/2027983 |
| Chicago | Webster's. 2011. "limestone" http://smartdefine.org/limestone/definitions/2027983 (accessed September 21, 2026). |
| Harvard | Webster's 2011, limestone, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/limestone/definitions/2027983>. |
| MLA | Webster's. "limestone" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/limestone/definitions/2027983> |