Oestrus

·noun A vehement desire; ·esp. (Physiol.), the periodical sexual impulse of animals; heat; rut.

II. Oestrus ·noun A genus of gadflies. The species which deposits its larvae in the nasal cavities of sheep is oestrus ovis.

oestrus
oestrus, i, m., = οἶστρος. I Lit., a gad-fly , horse-fly , breese (pure Lat. asilus): volitans,...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
oestrus
oestrus ī, m , οἶστρος, a gad-fly, horse-fly, breese, V.—Frenzy, inspiration, enthusiasm, Iu. ...

An Elementary Latin Dictionary