From Longman Dictionary of Contemporary EnglishRelated topics: Nature, Meteorology, Geographycumuluscu‧mu‧lus /ˈkjuːmjələs/ noun [countable, uncountable]DNa thick white cloud with a flatbottomedgeExamples from the Corpuscumulus• These clouds are unbroken, and never, for example, look like the billowy cumulus clouds of the Earth.• He stood against them, watching the darkwesternsky and the ash-blue cumulus now edged with brilliant white.• The sky is piled with sunlitJunecumulus.• The sky was blue, muddied with vastbanks of cloud like cumulus from a volcano.• The first hour proved fairly turbulent, as we skimmed under some cumulusbuild-ups.• The cumuluscells will disperse gradually to release the enclosedeggs over the next 2-4 min.• In fact the mountains were cumulus clouds and the roaring sound came from the surf.• Shasta because of the chance of thunderstorms, with cumulus building on the 14,162-foot summit early in the morning.Origincumulus(1800-1900)Modern LatinLatin, “pile, mass”
