estrus

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es·trus

also oes·trus  (ĕs′trəs)
n.
The periodic state of sexual excitement in the female of most mammals, excluding humans, that immediately precedes ovulation and during which the female is most receptive to mating; heat.

[New Latin, from Latin oestrus, frenzy, gadfly, from Greek oistros; see eis- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

estrus

(ˈɛstrəs; ˈiːstrəs)
n
(Zoology) the usual US spelling of oestrus
ˈestrous, ˈestrual adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

es•trus

(ˈɛs trəs)
n.
a recurring period of maximum sexual receptivity in most female mammals other than humans; heat.
[1885–90; < Latin oestrus < Greek oîstros gadfly, sting, frenzy]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

es·trus

(ĕs′trəs)
A regularly recurring period during which most female mammals are ready to mate. Also called heat.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

estrus, oestrus

the condition of being in rut or sexual arousal, applied particularly to the female. Also spelled estrum, oestrum. — estrous, oestrous, adj.
See also: Animals
the condition of being in rut or sexual arousal, applied particularly to the female. Also called est rum, oestrum. — estrous, oestrous, adj.
See also: Sex
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.estrus - applies to nonhuman mammals: a state or period of heightened sexual arousal and activityestrus - applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
physical condition, physiological condition, physiological state - the condition or state of the body or bodily functions
anestrum, anestrus, anoestrum, anoestrus - applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

estrus

also oestrus
noun
A regular period of sexual excitement in female mammals:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.