purgation
     n 1: purging the body by the use of a cathartic to stimulate
          evacuation of the bowels [syn: {catharsis}, {katharsis}]
     2: a ceremonial cleansing from defilement or uncleanness by the
        performance of appropriate rites [syn: {purification}]
     3: the act of clearing yourself (or another) from some stigma
        or charge [syn: {purge}, {purging}]
Source: WordNet® 2.0