Breadcrumb Home > Thesaurus > O Synonyms of osmium Find synonyms for: Noun 1. osmium, Os, atomic number 76, metallic element, metal usage: a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of osmium (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: vacuous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language