antestomach

A cavity that leads into the stomach, as in birds.

it is immediately swalled into […]a kind of Antestomach ( which I have observ'd in many , especially Piscivorous Birds ) where it is moistned and mollified by some proper Juice from the Glandules distilling in there.

The first stomach of a ruminant.

The physiological significance of microorganisms in the antestomach of ruminants .

The disturbance of the eructation reflex owing to the lacking permanent mechanical stimulation of the walls of the antestomach may be considered one of the reasons why the balanced reactions of rumination do not take place.

The lower portion of the esophagus in an animal that has a sphincter controlling the entrance of food from the esophagus into the stomach, especially when that portion of the esophagus is distended or dilated.

Fleiner calls attention to the existence of spindle-shaped dilation of the esophagus above the diaphragm, a condition that is termed antestomach, and to a similar condition of the subdiaphragmatic part of the esophagus, nown as "antrum cardiacum.". He has seen six instances of antestomach.

He had attempted to produce cancer in the antestomach of the rats, by painting them with tar in or around the mouth.