\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.

\Un"ci*form\, n. (Anat.)
The unciform bone. See Illust. of {Perissodactyla}.