a rapidly rotating funnel-shaped cloud extending downward from the base of a cumulonimbus cloud, which, if it touches the surface of the earth, is a tornado or waterspout. Also called pendant cloud, tornado cloud, tuba .
FUNNEL CLOUD
Meaning of FUNNEL CLOUD in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012