removing water or serum
• (n.) A hydragogue medicine, usually a cathartic or diuretic. • (a.) Causing a discharge of water; expelling serum effused into any part of the body, as in dropsy.
(hi´drә-gog) increasing the fluid content of the feces. a cathartic that has this effect.
Hy'dra·gogue adjective [ Latin hydragogus conveying off water, Greek ...; 
Type: Term Pronunciation: hī′dră-gog Definitions: 1. 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, saline cathartics.
hydragogue 1. Having the property of removing accumulations of water or serum, or of causing watery evacuations. 2. 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; such as, saline cathartics. 3. Causing watery discharge; especially, watery stools....
causing the discharge of watery fluid, as from the bowels.