Definition of "proventricular"

Commonly indicated for treatment of sour crop (Fig. 11-11, A), an ingluviotomy is done to retrieve crop calculi, ingluvioliths, or foreign bodies (which are not accessible per os) or to retrieve proventricular or ventricular foreign bodies (using micromagnets [glued in place within plastic tubes], lavage, or endoscopy) and for the placement of an ingluviotomy or proventriculotomy tube or the collection of crop wall biopsies.

2015, Jaime Samour, Avian Medicine, page 297

In contrast to ALBA proteins that are RNA-binding proteins involved in parasite development in the tsetse fly, the signal was not reduced in proventricular stages [42 ].

2015 July 29, “The Flagellar Arginine Kinase in Trypanosoma brucei Is Important for Infection in Tsetse Flies”, in PLOS ONE‎