oestrus
/ˈiːstrəs
/ /ˈɛstrəs /(US estrus)
noun [mass noun]
A recurring period of sexual receptivity and fertility in many female mammals; heat: a mare in oestrus...
- ‘When the female is in estrus, breeding bulls that are 35 to 55 years old and in their prime can be many miles away,’ Garstang said.
- Judging from mating rate, I found that female topi antelopes in estrus preferred lek males to resource defenders.
- A beef cow has a 21-day estrous cycle, the period from one estrus, or heat, to the next.
Derivatives
oestrous
/ /ˈɛstrəs / adjective ...- In contrast, it is proposed that estrous females on lek easily escape harassment by switching between the small territories.
- Social rank then determines access to estrous ewes during the rut.
- To assess whether shadowing was linked to estrus, we required an estimate of the likely estrous period for females.
Origin
Late 17th century: from Greek oistros 'gadfly or frenzy'.
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