/ Dictionary / Index P proventriculus: Meaning and Definition of Find definitions for: pro•ven•tric•u•lus Pronunciation: (prō"ven-trik'yu-lus), [key] — pl. -tric•u•li the glandular portion of the stomach of birds, in which food is partially digested before passing to the ventriculus or gizzard. a similar enlargement in the alimentary tract of several invertebrates, variously modified for maceration and digestion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. provenience pro-verb Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language