Hg uncommon noun 1. a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures Synonymsmercuryquicksilverhydrargyrumatomic number 80 2. 100 grams Synonymshectogram Related words Broader terms metric weight unitmetallic element Parts kilogramcinnabarcalomel Part of dekagram WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
