Breadcrumb Home > Thesaurus > E Synonyms of erbium Find synonyms for: Noun 1. erbium, Er, atomic number 68, metallic element, metal usage: a trivalent metallic element of the rare earth group; occurs with yttrium WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of erbium (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: insitu Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language