alumina Hear it!

alumina definition

alu·mina (ə lo̵̅o̅′mə nə)

noun

an oxide of aluminum, AlO, present in bauxite and clay and found as different forms of corundum, including emery, sapphires, and rubies

Etymology: ModL < L alumen (gen. aluminis), alum

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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