Kou·lan n. Zool. A wild horse (Equus onager or Asinus onager) inhabiting the plains of Central Asia; -- called also gour, khur, and onager. [Written also kulan.]
Note: ☞ It is sometimes confounded with the dziggetai, to which it is closely related. It is gray in winter, but fulvous in summer. It has a well defined, dark, dorsal stripe, and a short, erect mane. In size, it is intermediate between the horse and ass.
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On·a·ger n.; pl. L. Onagri E. Onagers
1. Rom. Antiq. A military engine acting like a sling, which threw stones from a bag or wooden bucket, and was operated by machinery.
2. Zool. A wild ass of central Asia, especially the koulan (Equus hemionus syn. Equus hemippus syn. Equus onager, formely Asinus onager).
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