funnel cloud

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funnel cloud

n.
A funnel-shaped cloud descending from a larger cloud, especially from a wall cloud, caused by the sudden condensation of water in the extreme low pressure of rapidly rotating air, as typically occurs in a tornado.

funnel cloud

n
(Physical Geography) a whirling column of cloud extending downwards from the base of a cumulonimbus cloud: part of a waterspout or tornado

fun′nel cloud`


n.
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.
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