altocumulus
/ˌæltəʊˈkjuːmjʊləs/noun
(pl. altocumuli /-laɪ/)［mass noun］
- cloud forming a layer of rounded masses with a level base, occurring at medium altitude (typically 2 to 7 km, 6,500 to 23,000 ft)高积云。
词源
late 19th cent.: from modern Latin alto- （from Latin altus 'high'） + CUMULUS.