Webster’s Revised Unabridged Dictionary · 1913
Diuretic
Di′u·ret′ic (·rĕt′ĭk), a. [L. diureticus, Gr. διονρητικός, fr. διουρεῖν to make water; διά through + οὐρεῖν to make water, fr. οὖρον urine: cf. F. diurétique.] (Med.) Tending to increase the secretion and discharge of urine. — n. A medicine with diuretic properties.
Diuretic salt (Med.), potassium acetate; — so called because of its diuretic properties.