Pisiform \Pi"si*form\, a. [L. pisum a pea + -form: cf. F. pisiforme.] Resembling a pea or peas in size and shape; as, a pisiform iron ore.
Source: Webster's Revised Unabridged Dictionary (1913)
Pisiform \Pi"si*form\, n. (Anat.) A small bone on the ulnar side of the carpus in man and many mammals. See Illust. of Artiodactyla.