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Pronunciation: (krō'mē-um), [key]
1. a lustrous, hard, brittle, metallic element used in alloy steels for hardness and corrosion resistance, as in stainless steel, and for plating other metals: chromium salts are used as pigments and mordants. Symbol: Cr; at. wt.: 51.996; at. no.: 24; sp. gr.: 7.1.
2. chrome (def. 2).

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

chromitechromium 51
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