Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'illinium'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