Swivel
SWIVEL, noun swiv'l.
1. A ring which turns upon a staple; or a strong link of iron used in mooring ships, and which permits the bridles to be turned round; any ring or staple that turns.
2. A small cannon or piece of artillery, carrying a shot of half a pound, fixed on a socket on the top of a ship's side, stern or bow, or in her tops, in such a manner as to be turned in any direction.
SWIVEL, verb intransitive swiv'l. To turn on a staple, pin or pivot.