a scarce, divalent or trivalent, silvery, malleable chemical element, one of the rare-earth elements, found with
yttrium in gadolinite and certain other minerals: symbol, Yb; at. no., 70 see the periodic table of elements in the Reference Supplement
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 'ytterbium'
ModL, contr. < neoytterbium,
so named (1907) by its discoverer, G. Urbain (see lutetium
) < ytterbia,
ytterbium oxide, name coined (1878) by J.-C. G. de Marignac, Swiss chemist who isolated
it, after Ytterby: