Breadcrumb Home > Dictionary > Index O omn. quadr. hor.: Meaning and Definition of Find definitions for: omn. quadr. hor. Pronunciation: [key] (in prescriptions) every quarter of an hour. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. omn. noct. Omolara TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: nosegay Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language