rectosigmoid
/ˌrɛktəʊˈsɪɡmɔɪd/Anatomy and Medicine
adjective
Designating the junction of the rectum and sigmoid colon; of or relating to this region of the large intestine.
noun
The rectosigmoid junction; the rectum and sigmoid colon considered as a unit.
Origin
Late 19th century; earliest use found in The Lancet. From recto- + sigmoid.