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 estrus ovis.

2.

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

 

© Webster 1913.

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