• (ventriculus) The portion of the stomach of some non-mammalian species located between the proventriculus and the small intestine.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• The thick-walld muscular pouch, part of the digestive system of birds, insects and invertebrates, which is responsible for digestion. It is located beneath the crop in birds and reptiles.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• (ventriculus) A thick-walled muscular pouch located beneath the proventriculus that is responsible for digestion in birds, insects and invertebrates.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• (gizzard, avian) The posterior portion of the avian stomach located between the PROVENTRICULUS and INTESTINE. It consists of a thick muscular wall and small stones (gastroliths) that function to mechanically grind SEEDS and other ingested objects.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Gizzard, in many birds, the hind part of the stomach, especially modified for grinding food. Located between the saclike crop and the intestine, the gizzard has a thick muscular wall and may contain small stones, or gastroliths, that function in the mechanical breakdown of seeds and other foods.
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020