ul·​tra·​pure ˌəl-trə-ˈpyu̇r How to pronounce ultrapure (audio)
: 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 Making chips is one of the most complex industrial processes in the world, and specialized inputs such as high-precision machines and ultrapure chemicals are produced only in other countries and probably will be for years. Nor will everything go smoothly. Geoff Colvin, Fortune, 8 Apr. 2024 Chips must be rinsed with ultrapure water during the manufacturing process, in addition to water being used to cool equipment, as in data centers. Michal Lev-Ram, Fortune, 29 Jan. 2024 Municipalities are also launching water recycling programs to relieve pressure on aquifers: New technologies can now turn very-much-not-consumable wastewater into ultrapure liquid for drinking or watering crops. Matt Simon, WIRED, 24 Jan. 2024 The instrument in a clearing on Newfoundland was quite simple: a glass cylinder, holding a little bit of ultrapure water, securely attached to the ground with wooden stakes. Matt Simon, WIRED, 18 Dec. 2023 Chip companies large and small are experimenting with slices of synthetic diamond, pieces of ultrapure glass or even an obscure material only recently synthesized in quantities sufficient to test its properties. Christopher Mims, WSJ, 4 Nov. 2023 In the case of the water used by the brewers, Clean Water Services uses a three-step process of Ultrafiltration, Reverse Osmosis, and Enhanced Oxidation to produce their ultrapure water. Vince C Reyes, Discover Magazine, 5 May 2015 The data is messy, however, and the ultracold temperature, ultrapure materials, and ultrastrong magnetic fields make the experiment tough to reproduce. Charlie Wood, Quanta Magazine, 9 May 2023 But the ice below the South Pole is ultrapure. Daniel Oberhaus, Wired, 12 June 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultrapure.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1818, in the meaning defined above

Time Traveler
The first known use of ultrapure was in 1818

Dictionary Entries Near ultrapure

Cite this Entry

“Ultrapure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultrapure. Accessed 18 Apr. 2024.

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