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cumulus

Pronunciation: /ˈkjuːmjʊləs/

The English word “cumulus” has 2 meanings listed here.

noun

  1. A heap or mound.
  2. A large white, puffy cloud that develops through convection.

Etymology

Learned borrowing from Latin cumulus. Doublet of comble. Sense 2 (“type of cloud”) was coined by the British chemist and amateur meteorologist Luke Howard (1772–1864): see the 1803 quotation.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.