Dictionary

mesocyclone

mesocyclone

noun me·so·cy·clone \ˌme-zə-ˈsī-ˌklōn, ˌmē-, -sə-ˈsī-\

Definition of MESOCYCLONE

:  a rapidly rotating air mass within a thunderstorm that often gives rise to a tornado

First Known Use of MESOCYCLONE

1963

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