Scaphoid \Scaph"oid\ (?; 277), a. [Gr. ska`fh a boat + -oid: cf. F. scapho["i]de.] (Anat.) Resembling a boat in form; boat-shaped. -- n. The scaphoid bone. {Scaphoid bone} (a) One of the carpal bones, which articulates with the radius; the radiale. (b) One of the tarsal bones; the navicular bone. See under {Navicular}.
scaphoid bone n : the largest wrist bone on the thumb side [syn: {os scaphoideum}, {navicular}]