Shagbark \Shag"bark`\, n. (Bot.) A rough-barked species of hickory ({Carya alba}), its nut. Called also {shellbark}. See {Hickory}. (b) The West Indian {Pithecolobium micradenium}, a legiminous tree with a red coiled-up pod. Shellbark \Shell"bark`\, n. (Bot.) A species of hickory ({Carya alba}) whose outer bark is loose and peeling; a shagbark; also, its nut.