/i vak"yooh euhnt/ , Med.
adj.
1. evacuating; promoting thorough evacuation, esp. from the bowels; cathartic; purgative.
n.
2. an evacuant medicine or agent; cathartic; purgative.
[ 1720-30; evacuant- (s. of evacuans, prp. of evacuare ). See EVACUATE, -ANT ]