1. any substance that tends to increase the flow of urine, which causes the body to get rid of excess water; [syn: diuretic drug, diuretic, water pill]
WordNet (r) 3.0 (2006):
water pill
n 1: any substance that tends to increase the flow of urine,
which causes the body to get rid of excess water [syn:
diuretic drug, diuretic, water pill]