benzothiadiazide

[bĕn′zō-thī′ə-dīə-zīd′]
n.
  1. Any of a group of diuretics that increase both sodium and chloride excretion and the volume of water excreted.thiazide
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.