pony

n.; pl. Ponies [ Written also poney. ] [ Gael. ponaidh. ] 1. A small horse. [ 1913 Webster ]

2. Twenty-five pounds sterling. [ Slang, Eng. ] [ 1913 Webster ]

3. A translation or a key used to avoid study in getting lessons; a crib; a trot. [ College Cant ] [ 1913 Webster ]

4. A small glass of beer. [ Slang ] [ 1913 Webster ]

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. [ 1913 Webster ]