A vertical cylindrical machine that revolves on a spindle, used to apply force to ropes, cables, etc. It is typically surmounted by a drumhead with sockets for levers used to turn it.
A rotating spindle used to move recording tape through the mechanism of a tape recorder.
A pin or bolt, usually vertical, which acts as a pivot for a hinge or a rudder.
An iron pin used to control recoil of a cannon or around which a gun carriage revolves.
The penis.