What does diuretic mean?
A diuretic is any substance that increases the amount of urine the body produces, though the term is most often applied to medications prescribed for this purpose. Diuretic drugs help the kidneys flush excess water and salt from the bloodstream, which reduces fluid buildup and lowers blood pressure; they are mainstay treatments for conditions such as hypertension, heart failure, kidney disease, and oedema. Common classes include thiazide diuretics, loop diuretics such as furosemide, and potassium-sparing diuretics, each acting on different parts of the nephron. Beyond medicine, everyday substances like caffeine and alcohol have mild diuretic effects. The word functions chiefly as a noun but can serve as an adjective, as in 'a diuretic herb'. Because it belongs primarily to clinical vocabulary, it carries a neutral, technical register rather than an emotional one.
A drug or other substance that increases the excretion of urine, used medically to treat high blood pressure, oedema, and certain kidney and heart conditions.
"The patient was switched to a loop diuretic after her symptoms worsened."
Frequently modified by class names: thiazide diuretic, potassium-sparing diuretic.
Having the property of increasing the production of urine.
"Dandelion root is traditionally valued for its diuretic properties."
Less common than the noun form; typically appears before nouns like 'effect', 'properties', or 'action'.
Standard English plural, formed by adding -s.
"Many patients take diuretics daily to manage their blood pressure."
The word 'diuretic' literally means 'to urinate through' — a drug whose name tells you exactly what it does.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diuretic
The word derives from the Greek verb diourein, meaning 'to pass urine', formed from dia- ('through') plus ourein ('to urinate'), which itself relates to ouron, 'urine'. It entered English in the early modern period via New Latin diureticus, following the pattern of learned medical terminology drawn from classical roots. It shares this uronic root with words such as diuresis, enuresis, urology, and urea.
How diuretic is actually used
Most often encountered in medical and health contexts; the noun sense is far more common than the adjective. Plural 'diuretics'.
Easily confused with diuretic
Dyspeptic means relating to or suffering from indigestion or irritability, whereas a diuretic is a substance that promotes urination.