a cloud within and around which the air is rotating about a horizontal axis, occurring in the lee of a large mountain barrier. Also called roll cloud .
[ 1955-60 ]
a cloud within and around which the air is rotating about a horizontal axis, occurring in the lee of a large mountain barrier. Also called roll cloud .
[ 1955-60 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012