Po"ny (?), n.; pl. Ponies (). [Written also poney.] [Gael. ponaidh.]
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.
© Webster 1913.