clear-air turbulence

noun
\ ˈklir-ˈer- How to pronounce clear-air turbulence (audio) \

Definition of clear-air turbulence

: sudden severe turbulence occurring in cloudless regions that causes violent jarring or buffeting of aircraft

First Known Use of clear-air turbulence

1955, in the meaning defined above

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The first known use of clear-air turbulence was in 1955

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