Definition of altocumulus in English:

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Pronunciation: /ˌaltəʊˈkjuːmjʊləs/

noun (plural altocumuli /ˌaltəʊˈkjuːmjʊlʌɪ/ /ˌaltəʊˈkjuːmjʊliː/)

[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): a layer of altocumulus [count noun]: altocumuli moved across the sky
More example sentences
  • No altocumulus cloud anywhere in Earth's real atmosphere would be caught dead above 20,000 feet.
  • By the time we had a task and were ready to rock the wind had backed off to only 10 km/h, and with the sun being blocked from wide spread altocumulus clouds conditions suddenly were barely soarable.
  • It is caused by light shining through thin altocumulus, which causes the light to bend as it passes through the water droplets within the cloud.


Late 19th century: from modern Latin alto- (from Latin altus 'high') + cumulus.

Words that rhyme with altocumulus

cirrocumulus, cumulus, stratocumulus, tumulus

For editors and proofreaders

Line breaks: alto|cumu¦lus

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