(n.) An elementary substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). calcium. Retrieved September 22, 2026, from http://smartdefine.org/calcium/definitions/1983853 |
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| MLA | Webster's. "calcium" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/calcium/definitions/1983853> |