[ex.tra.trop.i.cal cyclone] n (1923): a cyclone in the middle latitudes often being 1500 miles (2400 kilometers) in diameter and usu. containing a cold front that extends toward the equator for hundreds of miles
EXTRATROPICAL CYCLONE
Meaning of EXTRATROPICAL CYCLONE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012