/ Thesaurus / A Synonyms of atomic number 80 Find synonyms for: Noun1. mercury, quicksilver, hydrargyrum, Hg, atomic number 80, metallic element, metalusage: a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperaturesWordNet 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