ultrapure
adjective
ul·tra·pure
ˌəl-trə-ˈpyu̇r 
: extremely pure
ultrapure metals/crystals
especially
: extremely clean and free from contaminants such as dirt or bacteria
ultrapure water
Examples of ultrapure in a Sentence
Recent Examples on the Web
The pipe fitter at a pharmaceutical plant is installing the ultrapure water systems that drugmakers need to make medicine safe.
—
Sydney Lake, Fortune, 21 Apr. 2026
Manufacturers create fiber optic silicon dioxide, called silica, by chemically reacting gases that contain silicon with oxygen, leading to an ultrapure glass.
—John Ballato, The Conversation, 24 Mar. 2026
Over 60% of ultrapure water for semiconductor processes is purified with DuPont’s exchange resins.
—Jeff Marks, CNBC, 15 Oct. 2025
Silicon Wafers The ultrapure silicon is made up of many crystals at different orientations.
—IEEE Spectrum, 22 Sep. 2025
Researchers first treated and sterilized thin sections of fossil using a mixture of ultrapure water and ethanol.
—Andrew Paul, Popular Science, 6 Feb. 2025
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Sydney Lake, Fortune, 21 Apr. 2026
Manufacturers create fiber optic silicon dioxide, called silica, by chemically reacting gases that contain silicon with oxygen, leading to an ultrapure glass.
—John Ballato, The Conversation, 24 Mar. 2026
Over 60% of ultrapure water for semiconductor processes is purified with DuPont’s exchange resins.
—Jeff Marks, CNBC, 15 Oct. 2025
Silicon Wafers The ultrapure silicon is made up of many crystals at different orientations.
—IEEE Spectrum, 22 Sep. 2025
Researchers first treated and sterilized thin sections of fossil using a mixture of ultrapure water and ethanol.
—Andrew Paul, Popular Science, 6 Feb. 2025
Cite this Entry
“Ultrapure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrapure. Accessed 1 May. 2026.
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