wedge-shaped; as, a cuneiform bone; -- especially applied to the wedge-shaped or arrowheaded characters of ancient persian and assyrian inscriptions. see arrowheaded.-pertaining to, or versed in, the ancient wedge-shaped characters, or the inscriptions in them.-the wedge-shaped characters used in ancient persian and assyrian inscriptions.-one of the three tarsal bones supporting the first, second third metatarsals. they are usually designated as external, middle, and internal, or ectocuniform, mesocuniform, and entocuniform, respectively.-one of the carpal bones usually articulating with the ulna; -- called also pyramidal and ulnare.