- Anatomy. the third and lowest division of the small intestine, extending from the jejunum to the cecum.
- Zoology. the anterior portion of the hindgut of an insect or other arthropod.
Origin of ileum
Examples from the Web for ileum
The right is in contact with a coil of ileum, the left with the colon.A Manual of the Operations of Surgery
In Fig. 128 the ileum enters the colon from the right and below.The Anatomy of the Human Peritoneum and Abdominal Cavity
George. S. Huntington
The ileum is the part of the small intestine most frequently the seat of disease, but the ileum is rarely affected alone.
It is usually found in the lower part of the ileum, the ccum, sigmoid flexure, and other parts of the colon.
Perforating ulcers are occasionally seen in the large intestine or ileum.
- the part of the small intestine between the jejunum and the caecum
- the corresponding part in insects
Word Origin and History for ileum
lowest part of the small intestine, 1680s, medical Latin, from ileum, singular created from classical Latin plural ilia "groin, flank," in classical Latin, "belly, the abdomen below the ribs," poetically, "entrails, guts." Sense restriction and form apparently from confusion with Greek eileos (see ileus). Earlier in English ylioun (late 14c.), from Medieval Latin ileon. Related: Ileitis.
- The third and terminal portion of the small intestine, extending from the jejunum to the cecum.
- The lower part of the small intestine, connecting the jejunum to the cecum of the large intestine.