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Related to oestrus: oestrous cycle, Oestrus ovis


Variant of estrus.


(ˈiːstrəs; ˈɛstrəs) ,




(Zoology) 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]
ˈoestrous, ˈoestral, ˈestrous, ˈestral adj


(ˈɛs trəs)
a recurring period of maximum sexual receptivity in most female mammals other than humans; heat.
[1885–90; < Latin oestrus < Greek oîstros gadfly, sting, frenzy]

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
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.oestrus - applies to nonhuman mammals: a state or period of heightened sexual arousal and activityoestrus - 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
2.Oestrus - type genus of the Oestridae: sheep botflies
arthropod genus - a genus of arthropods
Oestrus ovis, sheep botfly, sheep gadfly - larvae are parasitic on sheep


also oestrus
A regular period of sexual excitement in female mammals:


estrus (US) [ˈiːstrəs] Nestro m
References in periodicals archive ?
The efficiency of treatments was tested evaluating oestrus behavior, using teaser bulls with reproductive device markers.
A number of antimalarial drugs have been implicated in infertility: halofantrine hydrochloride caused reduction in follicle size and cytoplasmic vacuolation in the ovary of the rats (Adjene and Agoreyo, 2003); chloroquine altered the oestrus cycle, lowered serum oestrogen, and LH levels, while serum FSH was unaltered and prevented the expected ovulation (Okanlawon and Ashiru, 1992); sperm motility as well as sperm counts were significantly decreased in pyrimethamine (PYR)-treated animals, and the fertility rate fell to zero (Kalla et al., 1997).
Oestrus ovis is the most common cause of ophthalmomyiasis externa worldwide3.
At December/2004 it was observed that two of the three lactating females already presented palpable fetuses (64 days prior the second birth), confirming the existence of a postpartum oestrus in this species.
This week's approval of norethisterone for oestrus suppression was seen as further testament to common sense.
External ophthalmomyiasis due to the sheep nostril botfly larva Oestrus ovis in Saudi Arabia.
Common cause of ocular myiasis is deposition of the sheep nasal bot fly (Oestrus ovis Linnaeus (Diptera: Oestridae)) or human bot fly (Dermatobia hominis Linnaeus (Diptera: Oestridae)) larvae in the cornea of the human eye.
African Plains headkeeper Helen Clarke-Bennett said: "We have a young female who has never shown any signs of coming in oestrus, meaning that she is ready to mate.
771, where the posterior view of the Oestrus variolosus larva is called frontal.
Klaus Lonne Ingvartsen of the Danish Institute of Agricultural Science spoke about an automated 'precision management' tool that should help producers to keep on top of herd health, fertility and productivity by identifying sub-clinical diseases, like mastitis, ketosis and oestrus.