The Collaborative International Dictionary
Donkey's eye
Donkey \Don"key\ (d[o^][ng]"k[y^]), n.; pl. Donkeys (d[o^][ng]"k[i^]z). [Prob. dun, in allusion to the color of the animal + a dim. termination.]
An ass; or (less frequently) a mule.
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A stupid or obstinate fellow; an ass.
Donkey engine, a small auxiliary engine not used for propelling, but for pumping water into the boilers, raising heavy weights, and like purposes.
Donkey pump, a steam pump for feeding boilers, extinguishing fire, etc.; -- usually an auxiliary.
Donkey's eye (Bot.), the large round seed of the Mucuna pruriens, a tropical leguminous plant.