oestrus

n. period of sexual readiness in all mammals (excluding humans), "heat" (Zoology)

Oestrus is also the biological genus name of the gadfly. The estrous cycle (also oestrous cycle; originally derived from Latin oestrus) comprises the recurring physiologic changes that are induced by reproductive hormones in most mammalian placental females. Humans undergo a menstrual cycle instead. Estrous cycles start after puberty in sexually mature females and are interrupted by anestrous phases. Typically estrous cycles continue until death. Some animals may display bloody vaginal discharge, often mistaken for menstruation.
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Oestrus /Oes·trus/ a genus of botflies. O. o´vis deposits its larvae in nasal passages of sheep and goats, and may cause ocular myiasis in humans. [more]Oestrus - Community and Resources

Noun
1. type genus of the Oestridae: sheep botflies
(synonym) genus Oestrus
(hypernym) arthropod genus
(member-holonym) Oestridae, family Oestridae, Hypodermatidae, family Hypodermatidae
(member-meronym) sheep botfly, sheep gadfly, Oestrus ovis

Noun
1. applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
(synonym) estrus, heat, rut
(hypernym) physiological state, physiological condition

n. estrus, heat, state of sexual activity (Zoology)