whirl·wind /-ˌwɪnd/
旋風,旋渦,旋流
Whirl·wind n.
1. A violent windstorm of limited extent, as the tornado, characterized by an inward spiral motion of the air with an upward current in the center; a vortex of air. It usually has a rapid progressive motion.
The swift dark whirlwind that uproots the woods.
And drowns the villages. --Bryant.
Note: ☞ Some meteorologists apply the word whirlwind to the larger rotary storm also, such as cyclones.
2. Fig.: A body of objects sweeping violently onward. “The whirlwind of hounds and hunters.”
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whirlwind
n : a more or less vertical column of air whirling around itself
as it moves over the surface of the Earth