Breadcrumb Home > Thesaurus > C Synonyms of cerium Find synonyms for: Noun 1. cerium, Ce, atomic number 58, metallic element, metal usage: a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cerium (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: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language