The Collaborative International Dictionary of English v.0.48:
Colitis \Co*li"tis\, n. [NL., fr. Gr. ? + -itis.] (Med.) An inflammation of the large intestine, esp. of its mucous membrane; colonitis. [1913 Webster]WordNet (r) 3.0 (2006):
colitis n 1: inflammation of the colon [syn: colitis, inflammatory bowel disease]