| nail [nāl] ANATOMY The horny epidermal derivative covering the dorsal aspect of the terminal phalanx of each finger and toe. DESIGN ENGINEERING A slender, usually pointed fastener with a head, designed for insertion by impact. ENGINEERING To drive nails in a manner that will position and hold two or more members, usually of wood, in a desired relationship. MEDICINE A metallic rod with one blunt end and one sharp end, used surgically to anchor bone fragments. |