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oestrus n. 發情,牛虻 發情,牛虻 oestrus n 1: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity [synonym: {estrus}, {oestrus}, {heat}, {rut}] [ant: {anestrum}, {anestrus}, {anoestrum}, {anoestrus}] 2: type genus of the Oestridae: sheep botflies [synonym: {Oestrus}, {genus Oestrus}] oestrus \oes"trus\, n. [L., a gadfly; also, frenzy, fr. Gr. ?
gadfly; hence, sting, fury, insane desire, frenzy.] 1. (Zool.) A genus of gadflies. The species which deposits its larvae in the nasal cavities of sheep is {oestrus ovis}. [1913 Webster] 2. A vehement desire. [1913 Webster] 3. Specifically: (Physiol.) The periodical sexual impulse of animals; the period during which female animals are most receptive to males; heat; rut. [1913 Webster PJC]
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