a liquid forced into the colon through the anus, as a purgative, medicine, etc.; clyster
the forcing of a liquid into the colon in such a way
See enema in American Heritage Dictionary 4
(ĕnˈə-mə)
noun
The injection of liquid into the rectum through the anus for cleansing, for stimulating evacuation of the bowels, or for other therapeutic or diagnostic purposes.