/ Dictionary / Index P petiolule: Meaning and Definition of Find definitions for: pet•i•o•lule Pronunciation: (pet'ē-ul-yl", -u-ll", pet"ē-ol'yl), [key] — n. Bot. a small petiole, as of a leaflet in a compound leaf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: petiolule (Thesaurus) petiole Petipa Related Content Daily Word Quiz: miscreant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language