Ŏn'a-ger, n.

noun

n. [Lat. onager, onagrus, Gr. ὄναγρος, Fr. onagre, Pr. onager, onagri, onagre, Sp., Pg., & It. onagro.]

(Zoöl.) The wild ass (Equus asinus), a soliped, pachydermatous mammal, originally inhabiting the great deserts of Central Asia, and still found there in its wild state.
(Antiq.) A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery. Fairholt.