illinium Hear it!

illinium definition

☆ il·lin·ium (i lin′ē əm)

noun

promethium

Etymology: ModL: so named (1926) by J. A. Harris & B. S. Hopkins, U.S. chemists, after the University of Illinois (where early research on it was done) + -ium

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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