Breadcrumb Home > Thesaurus > M Synonyms of manganese Find synonyms for: Noun 1. manganese, Mn, atomic number 25, metallic element, metal usage: a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of manganese (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: contretemps Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language