ultraclean

adjective
ul·​tra·​clean | \ ˌəl-trə-ˈklēn How to pronounce ultraclean (audio) \

Definition of ultraclean

: extremely or extraordinarily clean an ultraclean operating room ultraclean alternatives to fossil fuels

First Known Use of ultraclean

1888, in the meaning defined above

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The first known use of ultraclean was in 1888

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