Pony

Part of speech: noun (n.)

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. [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.