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proestrus

[proh-es-truh s]
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noun
  1. the period immediately preceding estrus.
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Also pro-oestrus.

Origin of proestrus

First recorded in 1920–25; pro-1 + estrus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for proestrus

proestrus

noun
  1. the usual US spelling of pro-oestrus
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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
proestrus in Medicine

proestrus

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