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anestrus

[an-es-truh s]
noun Zoology.
  1. (of a female mammal) the interval of sexual inactivity between two periods of heat or rut.
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Also anoestrus.

Origin of anestrus

First recorded in 1925–30; an-1 + estrus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for anestrus

anestrus

noun
  1. a variant spelling (esp US) of anoestrus
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Derived Formsanestrous, adjective
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