Po·ny n.; pl. Ponies  [Written also poney.]
 1. A small horse.
 2. Twenty-five pounds sterling. [Slang, Eng.]
 3. A translation or a key used to avoid study in getting lessons; a crib; a trot. [College Cant]
 4. A small glass of beer. [Slang]
 Pony chaise, a light, low chaise, drawn by a pony or a pair of ponies.
 Pony engine, a small locomotive for switching cars from one track to another. [U.S.]
 Pony truck Locomotive Engine, a truck which has only two wheels.
 Pony truss Bridge Building, a truss which has so little height that overhead bracing can not be used.

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 Bis·sell truck A truck for railroad rolling stock, consisting of two ordinary axle boxes sliding in guides attached to a triangular frame; -- called also pony truck.

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