calcium

calcium definition - medical

cal·ci·um (kălˈsē-əm)

noun Symbol Ca
A soft metallic element that is a basic component of animals and plants and constitutes approximately 3 percent of Earth's crust. It occurs naturally in limestone, gypsum, and fluorite. Atomic number 20.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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