is a specific kind of: internal organ, viscus.

is a broader term that covers: craw, crop | first stomach, rumen | reticulum, second stomach | omasum, psalterium, third stomach | abomasum, fourth stomach.

has as a part: arteria gastrica, gastric artery | gastric vein, vena gastrica | gastroepiploic vein, gastroomental vein, vena gastroomentalis | epigastric fossa, pit of the stomach.

is a part of: alimentary canal, alimentary tract, digestive tract, digestive tube, gastrointestinal tract, GI tract.

derivation: gastric, stomachal, stomachic.