• (small intestine) The villous section of the intestine extending from the pylorus to the proximal large intestine.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• (small intestine) A section of the digestive system that includes the duodenum, jejunum, and ileum and plays the major role in absorbing nutrients for the body.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• (small intestine) Organ with organ cavity which is continuous proximally with the stomach and distally with the large intestine. Examples: There is only one small intestine.
  Digital Anatomist
  University of Washington, 2003
• (small intestine) Organ with organ cavity, each instance of which is proximally continuous_with some stomach; distally continuous_with some large intestine. Examples: There is only one stomach.
  Foundational Model of Anatomy
  University of Washington, 2017
• (small intestine) Proximal part of the intestine, extending from the pylorus to the cecum; about twenty feet long in humans.
  CRISP Thesaurus
  National Institutes of Health, 2006
• (small intestine) The part of the digestive tract that is located between the stomach and the large intestine.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• (small intestine) The section of the intestines between the pylorus and cecum. The small intestine is approximately 20 feet long and consists of the duodenum, the jejunum, and the ileum. Its main function is to absorb nutrients from food as the food is transported to the large intestine.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• The duodenum is the first segment of the small intestine, and the stomach releases food into it. Food enters the duodenum through the pyloric sphincter in amounts that the small intestine can digest. When full, the duodenum signals the stomach to stop emptying.
  Merck Manuals
  Merck & Co., Inc., 2020
• The small intestine (small bowel) lies between the stomach and the large intestine (large bowel) and includes the duodenum, jejunum, and ileum. The small intestine is so called because its lumen diameter is smaller than that of the large intestine, although it is longer in length than the large intestine.
  Medscape
  WebMD, 2019
• Small intestine, a long, narrow, folded or coiled tube extending from the stomach to the large intestine; it is the region where most digestion and absorption of food takes place. It is about 6.7 to 7.6 metres (22 to 25 feet) long, highly convoluted, and contained in the central and lower abdominal...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020