Source:http://linkedlifedata.com/resource/umls/id/C2945764
NCI: An act or series of acts done in accordance with personal or social custom.,NCI: An action or series of actions that is repeated, often in a religious or social setting. In medicine, it may describe a repeated action (such as hand washing) done to relieve feelings of fear, dread, and uneasiness in people who have an obsessive-compulsive disorder.