erbium Hear it!

erbium definition

er·bium (ʉr′bē əm)

noun

a trivalent chemical element, one of the rare-earth elements: symbol, Er; at. no., 68

Etymology: ModL: so named (1843) by K. G. Mosander (1797-1858), Swed chemist, after Ytterby, village in Sweden where the rare-earth minerals were first found + -ium

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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