What is "unciform bone"

Unciform \Un"ci*form\, a. [L. uncus a hook + -form.] Having the shape of a hook; being of a curved or hooked from; hooklike.

Unciform bone (Anat.), a bone of the carpus at the bases of the fourth and fifth metacarpals; the hamatum.

n. the wrist bone in line with the 4th and 5th fingers [syn: hamate, hamate bone, os hamatum]