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mesocyclone
mesocyclone (ˈmɛsəʊˌsaɪkləʊn) n (Physical Geography) an area of vertically rotating air during a severe thunderstorm which can develop into a tornadomesocyclone
mesocyclone[¦me·zō¦sī‚klōn] (meteorology) A cyclonic circulation interior to a convective storm. mesocycloneThe cyclonic, rotating part of a large thunderstorm. Tornadoes usually are formed in association with the mesocyclone. |