‖n.; pl. L. Onagri E. Onagers [ L. onager, onagrus, Gr. &unr_;. ] 1. (Rom. Antiq.) A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery. Fairholt. [ 1913 Webster ]

2. (Zool.) A wild ass of central Asia, especially the koulan (Equus hemionus syn. Equus hemippus syn. Equus onager, formely Asinus onager). [ 1913 Webster +PJC ]

n. (Zool.) The dauw. [ 1913 Webster ]

n. A form of drum used by the Chippewa indians. [ Century Dict. 1906 ]

prop. n. (Bot.) Same as Oenothera, a genus of plants consisting of the evening primrose. [ PJC ]

n. The female of the onager. [ PJC ]

{ } a. [ From NL. Onagra an old scientific name of the evening primrose (Œnothera), fr. Gr. 'ona`gra a kind of plant; of uncertain origin. ] (Bot.) Pertaining to, or resembling, a natural order of plants (Onagraceae or Onagrarieae), which includes the fuchsia, the willow-herb (Epilobium), and the evening primrose (Œnothera). [ 1913 Webster ]

n. [ Onan (Gen. xxxviii. 9): cf. F. onanisme. ] Self-pollution; masturbation. [ 1913 Webster ]

‖n. (Zool.) A nocturnal South American monkey (Callithrix discolor), noted for its agility; -- called also ventriloquist monkey. [ 1913 Webster ]