mesocyclone

[mez-uh-sahy-klohn, mes-, mee-zuh-, -suh-]

noun Meteorology.

a small cyclone that arises near a thunderstorm and is sometimes associated with the occurrence of tornadoes.

Origin of mesocyclone

First recorded in 1970–75; meso- + cyclone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019