onager

plural onagers · plural onagri

1. The Asiatic wild ass or hemione (Equus hemionus), an animal of the horse family native to Asia; specifically, the Persian onager, Persian wild ass, or Persian zebra (Equus hemionus onager).

   One of the onagers, however, having hurt its leg, could not be harnessed at present, and a few days' rest was necessary.

   1875, Jules Verne, chapter VI, in W[illiam] H[enry] G[iles] Kingston [actually Agnes Kinloch Kingston], transl., The Mysterious Island: The Secret of the Island: Translated from the French, volume III, London: Sampson Low, Marston, Low, & Searle […], →OCLC, pages 82–83

   2 more examples

   [I]f the czigithai is not the ſame with the zebra, it may be the Aſiatic animal called onager or wild aſs. The onager ſhould not be confounded with the zebra; but I am uncertain whether the ſame remark is applicable to the onager and czigithai; for, from comparing the relations of travellers, it appears, that there are different kinds of wild aſſes, of which the onager is the moſt remarkable. […] The ſwiftneſs of the onager is mentioned by travellers, who remark, that he runs with ſuch rapidity as to eſcape the hunters, though mounted on horſes; […]

   1785, Count de Buffon [i.e., Georges-Louis Leclerc, Comte de Buffon], “The Zebra. [Supplement.]”, in William Smellie, transl., Natural History, General and Particular, … Translated into English. […], 2nd edition, volume VI, London: Printed for W[illiam] Strahan and T[homas] Cadell, […], →OCLC, page 275

   The onager, or wild aſs, is ſeen in ſtill greater abundance than the wild horſe; and the peculiarities of its kind are more diſtinctly marked than in thoſe of the tame one.

   1791, Oliver Goldsmith, “Of the Ass”, in An History of the Earth, and Animated Nature. […], new edition, volume II, London: […] F[rancis] Wingrave, successor to Mr. [John] Nourse, […], →OCLC, page 345

   Synonyms: hemionus

2. historicalgovernmentA military engine acting like a sling which threw stones from a bag or wooden bucket powered by the torsion from a bundle of ropes or sinews operated by machinery; a torsion catapult.

   1 more example

   The onager, meaning "wild ass," derived its name from its powerful recoil, or kick, upon discharge; […] In addition, although Josephus described an onager in action hurling a 100-pound stone over 400 yards, most onagri achieved a shorter range than the ballista, thus exposing their crews to enemy archers.

   2007, Jeff Kinard, “Ancient and Medieval Artillery”, in Artillery: An Illustrated History of Its Impact (Weapons and Warfare Series), Santa Barbara, Calif.: ABC-CLIO, →ISBN, page 17