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rotor cloud

American  

noun

  1. a cloud within and around which the air is rotating about a horizontal axis, occurring in the lee of a large mountain barrier.

Etymology

Origin of rotor cloud

First recorded in 1955–60

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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