proestrus

[ proh-es-truhs ]
/ proʊˈɛs trəs /

noun

the period immediately preceding estrus.

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Also especially British, pro-oes·trus [proh-es-truhs, ‐ee-struhs] /proʊˈɛs trəs, ‐ˈi strəs/ .

Origin of proestrus

First recorded in 1920–25; pro-1 + estrus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for proestrus

proestrus
/ (prəʊˈɛstrəs, -ˈiːstrəs) /

noun

the usual US spelling of pro-oestrus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for proestrus

proestrus
[ prō-ĕstrəs ]

n.

The period immediately before estrus in most female mammals, characterized by development of the endometrium and ovarian follicles.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.