/ Thesaurus / A Synonyms of atomic number 25 Find synonyms for: Noun1. manganese, Mn, atomic number 25, metallic element, metalusage: a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many mineralsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language