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cycloneMain Entry: cy·clone Pronunciation: \ˈsī-ˌklōn\ Function: noun Etymology: modification of Greek kyklōma wheel, coil, from kykloun to go around, from kyklos circle Date: 1848 1 a : a storm or system of winds that rotates about a center of low atmospheric pressure, advances at a speed of 20 to 30 miles (about 30 to 50 kilometers) an hour, and often brings heavy rain b : tornado c : 4low 1b — cy·clon·ic \sī-ˈklä-nik\ adjective — cy·clon·i·cal·ly \-ni-k(ə-)lē\ adverb
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