noun Pharmacology.
  1. a thiazide diuretic, C16H16ClN3O3S, used in the treatment of hypertension and as a diuretic in patients with chronic renal failure.

Origin of metolazone

contraction and rearrangement of meth-, quinazoline, -one components of the chemical name Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018