Source:http://linkedlifedata.com/resource/umls/id/C0003461
NCI: The lower opening of the digestive tract, lying in the cleft between the buttocks, through which fecal matter is extruded.,NCI: The opening of the rectum to the outside of the body.,NCI: The lower opening of the digestive tract, lying in the cleft between the buttocks, through which fecal matter is extruded. (NCI),MSH: The external outlet of the GASTROINTESTINAL TRACT.