water pill

noun

: a diuretic pill

Examples of water pill in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Diuretics, also known as water pills, are a class of drugs that increase urine production and help the body get rid of excess fluid and salt. — Mirna Alsharif, NBC News, 4 Mar. 2025 Many water pills also lower potassium. — Merve Ceylan, Health, 22 Nov. 2025 This can happen after vomiting, diarrhea, heavy sweating, or taking medicines like diuretics (water pills) or laxatives. — Lindsay Curtis, Verywell Health, 19 Feb. 2026 Your medications could be a factor Certain medications, especially diuretics (water pills) prescribed for high blood pressure or heart conditions, can significantly increase nighttime urination by boosting urine output. — Dr. Jamin Brahmbhatt, CNN Money, 26 Mar. 2025

Word History

First Known Use

1967, in the meaning defined above

Time Traveler
The first known use of water pill was in 1967

Rhymes for water pill

See All Rhymes for water pill

Browse Nearby Words

water pig
water pill
water pilot
See all Nearby Words

Cite this Entry

“Water pill.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20pill. Accessed 8 Jul. 2026.

Copy Citation

Medical Definition

water pill

noun
: a diuretic pill
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of gambol

See Definitions and Examples »

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All