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
Silicon Wafers The ultrapure silicon is made up of many crystals at different orientations.
—
IEEE Spectrum, 22 Sep. 2025
Low-iron glass is made from ultrapure sand that is low in iron oxide.
—Aki Ishida, The Conversation, 10 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
The famed Super-Kamiokande detector in Japan, which detected all of 12 neutrinos from a distant supernova in 1987, uses 50,000 metric tons of ultrapure water to catch a glimpse of the occasional neutrino interaction.
—Paul Sutter, Ars Technica, 11 June 2024
That process requires expensive tools, such as lithography machines, and ultrapure water filtration.
—Dylan Sloan, Fortune, 10 Apr. 2024
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IEEE Spectrum, 22 Sep. 2025
Low-iron glass is made from ultrapure sand that is low in iron oxide.
—Aki Ishida, The Conversation, 10 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
The famed Super-Kamiokande detector in Japan, which detected all of 12 neutrinos from a distant supernova in 1987, uses 50,000 metric tons of ultrapure water to catch a glimpse of the occasional neutrino interaction.
—Paul Sutter, Ars Technica, 11 June 2024
That process requires expensive tools, such as lithography machines, and ultrapure water filtration.
—Dylan Sloan, Fortune, 10 Apr. 2024
Cite this Entry
“Ultrapure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrapure. Accessed 21 Oct. 2025.
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