/ Dictionary / Index O omn. bih.: Meaning and Definition of Find definitions for: omn. bih. Pronunciation: [key] (in prescriptions) every two hours. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ommiad omn. hor. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language