/ Dictionary / Index P pisiform: Meaning and Definition of Find definitions for: pi•si•form Pronunciation: (pī'su-fôrm"), [key] — adj. pea-shaped. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pisiform (Thesaurus) Pisidian Pisistratidae Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language