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ul·tra·smooth | \ ˌəl-trə-ˈsmüṯẖ 
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\Definition of ultrasmooth
: extremely or extraordinarily smooth an ultrasmooth surface the car's ultrasmooth shifting This mustard's ultrasmooth consistency led one taster to note that it seems whipped. — Cook's Illustrated
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Time Traveler for ultrasmooth
The first known use of ultrasmooth was in 1850
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