cyclone

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. (meteorology) rapid inward circulation of air masses about a low pressure center;
circling counterclockwise in the northern hemisphere and clockwise in the southern
• Ant:
anticyclone
• Derivationally related forms:
cyclonic, cyclonal, cyclonical
• Topics:
meteorology
• Hypernyms:
atmosphere, atmospheric state
• Part Meronyms:
low, depression
2. a violent rotating windstorm
• Derivationally related forms:
cyclonic, cyclonal, cyclonical
• Hypernyms:
windstorm
• Hyponyms:
hurricane, tornado, twister, typhoon