Breadcrumb Home > Dictionary > Index P pro-oestrus: Meaning and Definition of Find definitions for: pro-oes•trus Pronunciation: (prō-es'trus, -ē'strus), [key] — n. proestrus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prony brake proof 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: oblique Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language