altostratus
/ˌæltəʊˈstreɪtəs/noun
mass noun
- cloud forming a continuous uniform layer which resembles stratus but occurs at medium altitude (typically 2 to 7 km, 6,500 to 23,000 ft)高层云。
词源
late 19th cent.: from modern Latin alto- （from Latin altus 'high'） +STRATUS.