This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.

n. A pile, mound, or heap.

n. A large white puffy cloud that develops through convection. On a hot, humid day, they can form towers and even become cumulonimbus clouds.

n. A mound or heap.

n. One of the four principal forms of clouds. Seecloud.

n. The kind of cloud which appears in the form of rounded heaps or hills, snowy-white at top with a darker horizontal base, characteristic of mild, calm weather, especially in summer; the summer-day cloud. See cut under cloud, 1.

n. In anatomy, a heap of cells surrounding a ripe ovum in the Graafian follicle, and constituting the discus proligerus.

n. a collection of objects laid on top of each other

n. a globular cloud

"The word cumulus has a root similar to accumulate and means “piled up.”"

turreted cumulus   

cumuli    cloud   

heap    cloudy   

accedit    optata    stratus    discat    pesty    cotton wool    meritus    cumulous    concedat    fugae