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单词 altocumulus
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WordReference Random House Unabridged Dictionary of American English © 2024
al•to•cu•mu•lus  (al′tō kyo̅o̅myə ləs),USA pronunciation n., pl. -lus. [Meteorol.]
  1. Meteorologya cloud of a class characterized by globular masses or rolls in layers or patches, the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus: of medium altitude, about 8000–20,000 ft. (2450–6100 m).
  • alto- + cumulus 1890–95

Collins Concise English Dictionary © HarperCollins Publishers::
altocumulus /ˌæltəʊˈkjuːmjʊləs/ n ( pl -li / -laɪ/)
  1. a globular cloud at an intermediate height of about 2400 to 6000 metres (8000 to 20 000 feet)
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