Wild donkeys

• Wild Asian equines
• Extremely deficient personage trained animals
• An ogre's destroyed due to stone-hurlers
• Wild asses of central Asia
• Ancient catapults
• Wild asses of Asia
• Catapults of early warfare, which threw stones
• Asses with dorsal stripes

Wiktionary Word definitions in Wiktionary
alt. (plural of onager English) n. (plural of onager English)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Onager \On"a*ger\, n.; pl. L. Onagri , E. Onagers . [L. onager, onagrus, Gr. ?.] (Rom. Antiq.) A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery. --Fairholt. (Zo["o]l.) A wild ass of central ...