- estrus, oestrus, heat, rut - applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
--1 is a kind of physiological state, physiological condition
- Oestrus, genus Oestrus - type genus of the Oestridae: sheep botflies
--2 is a kind of arthropod genus
--2 is a member of
--2 has members: sheep botfly, sheep gadfly, Oestrus ovisOestridae, family Oestridae, Hypodermatidae, family Hypodermatidae