Pin

A metal instrument shaped like a needle, but with a globular head, used for fastening or holding parts together. P. -buttock, a sharp, angular buttock. P., Center, the pointed steel rod projecting from the center of the trephine-saw, used for fixing the trephine. P., Harelip, a strong, long pin pa ed through the lips of a wound in order to form a support for the sutures which are wound around it. P. -sensation. See Pins and Areedles. P.worm. See Oxyuris vermicular is among Parasites (Animal), 7 able of.