Producing a discharge of watery fluid; denoting a class of cathartics that retain fluids in the intestine and aid in the removal of edematous fluids, e.g., saline cathartics. [hydr- + G. agogos, drawing forth]
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hy·dra·gogue also hy·dra·gog 'hī-drə-.gäg n a cathartic that causes copious watery discharges from the bowels
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hy·dra·gogue (hiґdrə-gog) [hydr- + -agogue] 1. producing watery discharge, especially from the intestines. 2. a cathartic that has this action.Medical dictionary. 2011.