/ Dictionary / Index P pyriform: Meaning and Definition of Find definitions for: pyr•i•form Pronunciation: (pir'u-fôrm"), [key] — adj. pear-shaped. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyridoxine pyrimethamine Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language