ul·​tra·​clean ˌəl-trə-ˈklēn How to pronounce ultraclean (audio)
: extremely or extraordinarily clean
an ultraclean operating room
ultraclean alternatives to fossil fuels

Examples of ultraclean in a Sentence

Recent Examples on the Web In this program, the ESA Web TV crew travel back to Turin, Italy, to talk to the teams and watch as new tests are being conducted with the rover’s Earth twin, Amalia, while the real rover remains carefully stored in an ultraclean room. IEEE Spectrum, 22 Mar. 2023 Clean Whipped Clay Detox Face Mask leaves your face feeling ultraclean but not stripped dry. Allure Editors, Allure, 13 Sep. 2022 They are made on gigantic, ultraclean factory room floors that can be seven stories tall and run the length of four football fields. New York Times, 8 Apr. 2022 The chalk-size core will be stored in an ultraclean metallic tube, one of 38 samples that the rover eventually collects, with about 30 of those likely to be returned to Earth by later missions. Paul Voosen, Science | AAAS, 21 July 2021 Recipharm is hiring around 65 workers and training them to work in the ultraclean conditions of its production lines. Joseph Walker, WSJ, 19 Dec. 2020

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultraclean.' 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

1888, in the meaning defined above

Time Traveler
The first known use of ultraclean was in 1888

Dictionary Entries Near ultraclean

Cite this Entry

“Ultraclean.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraclean. Accessed 14 Apr. 2024.

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