oestrus
oestrus[ˈiːstrəs, ˈɛstrəs](美 estrus)noun- [mass noun]a recurring period of sexual receptivity and fertility in many female mammals; heat
(许多雌性哺乳动物的)发情期,动情期;激情
a mare in oestrus.
发情期的母马。
派生oestrousadjective语源- late 17th cent.: from Greek oistros 'gadfly or frenzy'
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