cumul-

1 of 2

combining form

variants or cumuli- or cumulo-

: cumulus and

cumulonimbus

cumulus

2 of 2

noun

cu·mu·lus ˈkyü-myə-ləs

plural cumuli ˈkyü-myə-ˌlī -ˌlē

: heap, accumulation

[New Latin, from Latin] : a dense puffy cloud form having a flat base and rounded outlines often piled up like a mountain see cloud illustration

Examples of cumul- in a Sentence

Noun the cumulus of sundry things that fill up one's attic and somehow sum up a lifetime of experiences

Recent Examples on the Web

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Noun

McReynolds said forecasters are primarily watching offshore cumulus clouds, and the possibility of those producing showers or thunderstorms. — Josh Dinner, Space.com, 29 Aug. 2026 The main concern would be showers that could bring in cumulus clouds and possible lightning. — Richard Tribou, The Orlando Sentinel, 28 Aug. 2026 Dean has an unerring sense about how to let her voice glide to the cumulus layer and back again, without remotely ever going over the top. — Chris Willman, Variety, 17 July 2026 Beehive is more delicate, sending up painterly tendrils that form a thin scrim in front of the landscape of volcanic sediment, evergreens, and puffy cumulus clouds. — Jesse Ashlock, Condé Nast Traveler, 14 July 2026 See All Example Sentences for cumul-

Word History

Etymology

Combining form

New Latin, from Latin cumulus

Noun

Latin

First Known Use

Noun

1659, in the meaning defined at sense 1

Time Traveler

The first known use of cumul- was in 1659

See more words from the same year

Browse Nearby Words

cumshaw

cumul-

cumulant

See all Nearby Words

Cite this Entry

Style

“Cumul-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cumul-. Accessed 1 Sep. 2026.

Copy Citation

cumul-

combining form

noun

Synonyms of cumul-

Examples of cumul- in a Sentence

Word History

Browse Nearby Words

Cite this Entry

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