/ Dictionary / Index O osmious: Meaning and Definition of Find definitions for: os•mi•ous Pronunciation: (oz'mē-us), [key] — adj. Chem. of or containing osmium in its lower valences. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. osmidrosis osmiridium Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language