A long, thin bone in a fish extending sideways from the backbone.

(firearms) the part of the firing mechanism which strikes the cartridge's primer to ignite the gunpowder.

plural of bitt-pin

(nautical) A device like a belaying pin but of heavier scantlings; a turned length of wood or metal passed through the bitts or cross-piece, used to prevent the cable from slipping off or over the bitt-heads yet removable so as to facilitate doing so.

plural of cotter pin

plural of firing pin

plural of belaying pin

(transitive) To put (e.g. a sheet of paper) on display, using a pin.

Alternative form of pin money

(historical) An allowance of money given by a man to his wife or to other dependents for their personal, discretionary use.