Piston vs Bison - What's the difference?
piston | bison |
A solid disk or cylinder that fits inside a hollow cylinder, and moves under pressure (as in an engine) or displaces fluid (as in a pump)
(music) A valve device in some brass instruments for changing the pitch
A wild ox, Bison bonasus .
A similar American animal, Bison bison'' else ''Bos americanus'' or ''Bisonte americano ; also called a buffalo.