ileum ile-st-louis • ileus · · · Info · Definitions · Characters · · ileum · · Text Latin · · Script 5 · · Length 3 · · Syllables Definitions · · · (noun) the part of the small intestine between the jejunum and the cecum. · · Noun Definition 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D u latin small letter u U+0075