Origin: See Pin.
(Science: chemistry) To peen.
1. A piece of wood, metal, etc, generally cylindrical, used for fastening separate articles together, or as a support by which one article may be suspended from another; a peg; a bolt. With pins of adamant And chains they made all fast. (milton)
8. (Science: medicine) Caligo. See Caligo.
9. An ornament, as a brooch or badge, fastened to the clothing by a pin; as, a Masonic pin.
10. The leg; as, to knock one off his pins. Banking pin, a drill with a central pin or projection to enter a hole, for enlarging the hole, or for sinking a recess for the head of a bolt, etc.; a counterbore. Pin grass.
Origin: OE. Pinne, AS. Pinn a pin, peg; cf. D. Pin, G. Pinne, Icel. Pinni, W. Pin, Gael. & Ir. Pinne; all fr. L. Pinna a pinnacle, pin, feather, perhaps orig. A different word from pinna feather. Cf. Fin of a fish, Pen a feather.