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a combining form representing cumulus, in compound words.
Also, cumuli-; especially before a vowel, cumul-.
Origin of cumulo-
see cumulus, -o- Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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cumuli in Science
Plural cumuli (kym'yə-lī')
A dense, white, fluffy cloud with a flat base, a multiple rounded top, and a well-defined outline. The bases of cumulus clouds form primarily in altitudes below 2,000 m (6,560 ft), but their tops can reach much higher. Cumulus clouds are generally associated with fair weather but can also bring rain when they expand to higher levels. The clouds' edges are well-defined when they are composed of water droplets and fuzzy when made up of ice crystals. See illustration at cloud.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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