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WordNet-Online 
 Definitions from WordNet
Noun cirrus cloud has 1 sense 
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| Definitions from the WebCirrus CloudDefinition: A cirrus cloud is a high, thin cloud that appears like a white, wispy filament in the sky. It is composed of ice crystals and usually indicates fair weather. Parts of Speech: Noun Senses: 
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| cirriculum cirripedia cirrocumulus cirrocumulus cloud cirrohsis cirrostratus cirrostratus cloud cirrus cirrus cloud cirseam cirsium cirsium arvense cirsium discolor cirsium eriophorum cirsium flodmanii cirsium helenioides cirsium heterophylum 
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