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[dahy-uh-ret-ik] /ˌdaɪ əˈrɛt ɪk/
increasing the volume of the urine excreted, as by a medicinal substance.
a diuretic medicine or agent.
Origin of diuretic
1375-1425; Middle English d(i)uretik < Late Latin diūrēticus < Greek diourētikós, equivalent to di- di-3 + ourē- (verbid stem of oureîn to urinate) + -tikos -tic
Related forms
diuretically, adverb
diureticalness, noun
undiuretic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for diuretic
  • Medical experts have been saying for years that caffeine acts as a potent diuretic.
  • It also acts as a diuretic and can be a urinary tract irritant.
  • diuretic treatment and supplemental oxygen are recommended for patients with fluid retention and low blood oxygen, respectively.
  • He tested positive for hydrochlorothiazide, a diuretic that can be used to treat hypertension.
  • The steroid would add muscle and the diuretic would drain the body of fluid and make the muscle stand out more.
  • Hyaline casts are usually caused by dehydration, exercise, or diuretic medicines.
  • Chamomile also works well as a sedative, but it is also a diuretic so you may wake in the middle of the night to pee.
  • The treatment is mannitol, an inexpensive sugar compound widely used in medical practice as a diuretic.
  • She started her on a higher dose of diuretic to reduce the swelling in her legs and the fluid in her lungs.
  • If excessive nighttime urination is due to diuretic medications, you may be told to take your medication earlier in the day.
British Dictionary definitions for diuretic


acting to increase the flow of urine
a drug or agent that increases the flow of urine
Derived Forms
diuretically, adverb
diureticalness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for diuretic

c.1400 (adjective and noun), from Old French diuretique, from Late Latin diureticus, from Greek diouretikos "prompting urine," from diourein "urinate," from dia "through" (see dia-) + ourein "urinate," from ouron (see urine).

Online Etymology Dictionary, © 2010 Douglas Harper
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diuretic in Medicine

diuretic di·u·ret·ic (dī'ə-rět'ĭk)
Tending to increase the discharge of urine. n.
A substance or drug that tends to increase the discharge of urine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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diuretic in Science
A substance or drug that tends to increase the discharge of urine. Diuretics are used in the treatment of high blood pressure, edema, and other medical conditions.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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diuretic in Culture
diuretic [(deye-uh-ret-ik)]

A substance that increases the rate of urine production.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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