[es-truh s, ee-struh s]
Origin of oestrus
1690–1700; < Latin < Greek oîstros gadfly, sting, madness
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for oestrus
It is, however, less prominent than in oestrus, and does not gape.
Females which had borne and suckled young were first found to be in oestrus 65 to 104 days after birth of the young.American Weasels
E. Raymond Hall
An apparent instance of hostility between rival males competing for an oestrus female was observed on September 2, 1950.
Females examined in February mostly were perforate and many of them appeared to be in oestrus.
Vaginal smears at this stage often showed nucleated cells characteristic of oestrus.
US estrus or US estrum (ˈiːstrəm, ˈɛstrəm)
- a regularly occurring period of sexual receptivity in most female mammals, except humans, during which ovulation occurs and copulation can take place; heat
C17: from Latin oestrus gadfly, hence frenzy, from Greek oistros
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
Word Origin and History for oestrus
Online Etymology Dictionary, © 2010 Douglas Harper
- Variant ofestrus
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.