| n. | 1. | (Zool.) A genus of gadflies. The species which deposits its larvæ in the nasal cavities of sheep is strus ovis. |
| 2. | A vehement desire. | |
| 3. | (Physiol.) The periodical sexual impulse of animals; the period during which female animals are most receptive to males; heat; rut. |
| Noun | 1. | oestrus - applies to nonhuman mammals: a state or period of heightened sexual arousal and activity |
| 2. | Oestrus - type genus of the Oestridae: sheep botflies Synonyms: genus Oestrus |
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