cirrus
noun /ˈsɪrəs/
/ˈsɪrəs/
[uncountable] (specialist)- a type of light cloud that forms high in the sky
Topics Weatherc2卷云 Collocations DictionaryCirrus is used before these nouns:- cloud
词源early 18th cent. (in the sense ‘tendril’): from Latin, literally ‘a curl’.