reverse osmosis

noun

: the movement of fresh water through a semipermeable membrane when pressure is applied to a solution (such as seawater) on one side of it

Examples of reverse osmosis in a Sentence

Recent Examples on the Web
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The water utility company is bringing water from the Des Moines and Raccoon rivers and treating a portion of that water by running it through a reverse osmosis system, which will remove nitrate levels, Larry Weber, director of the University of Iowa's IIHR—Hydroscience & Engineering, told ABC News. Julia Jacobo, ABC News, 16 June 2025 The machine draws water from the lagoon, it is purified naturally then treated with reverse osmosis and UV light to kill germs. Kissa Castaneda, Forbes.com, 30 May 2025 Outside of the Middle East, reverse osmosis (RO) is the most common technique. IEEE Spectrum, 8 Feb. 2012 Suppliers will be encouraged to use waterless dyes or closed-loop technology such as cold batch dyeing or reverse osmosis processing. Rhonda Richford, Footwear News, 3 Sep. 2019 See All Example Sentences for reverse osmosis

Word History

First Known Use

1921, in the meaning defined above

Time Traveler
The first known use of reverse osmosis was in 1921

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Cite this Entry

“Reverse osmosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reverse%20osmosis. Accessed 21 Jul. 2025.

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