From Biology-Online Dictionary | Biology-Online Dictionary

An injection of liquid meant to clear the colon. Originally the term colonic, or high colonic, was used to indicate a large volume enema. however, there are colonic hydrotherapists who use machines to wash the colon, and the term is now used for that process as well. A traditional colonic consists of 1 to 2 quarts of water, sometimes with a mild soap added for additional stimulation of the colon.