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Longman Dictionary of Contemporary English
cumulus
noun
EXAMPLES FROM CORPUS
▪ He stood against them, watching the dark western sky and the ash-blue cumulus now edged with brilliant white.
▪ 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.
▪ The cumulus cells will disperse gradually to release the enclosed eggs over the next 2-4 min.
▪ The first hour proved fairly turbulent, as we skimmed under some cumulus build-ups.
▪ The sky is piled with sunlit June cumulus.
▪ The sky was blue, muddied with vast banks of cloud like cumulus from a volcano.
▪ These clouds are unbroken, and never, for example, look like the billowy cumulus clouds of the Earth.
The Collaborative International Dictionary
Cumulus

Cloud \Cloud\ (kloud), n. [Prob. fr. AS. cl[=u]d a rock or hillock, the application arising from the frequent resemblance of clouds to rocks or hillocks in the sky or air.]

  1. A collection of visible vapor, or watery particles, suspended in the upper atmosphere. I do set my bow in the cloud. --Gen. ix. 13. Note: A classification of clouds according to their chief forms was first proposed by the meteorologist Howard, and this is still substantially employed. The following varieties and subvarieties are recognized:

    1. Cirrus. This is the most elevated of all the forms of clouds; is thin, long-drawn, sometimes looking like carded wool or hair, sometimes like a brush or room, sometimes in curl-like or fleecelike patches. It is the cat's-tail of the sailor, and the mare's-tail of the landsman.

    2. Cumulus. This form appears in large masses of a hemispherical form, or nearly so, above, but flat below, one often piled above another, forming great clouds, common in the summer, and presenting the appearance of gigantic mountains crowned with snow. It often affords rain and thunder gusts.

    3. Stratus. This form appears in layers or bands extending horizontally.

    4. Nimbus. This form is characterized by its uniform gray tint and ragged edges; it covers the sky in seasons of continued rain, as in easterly storms, and is the proper rain cloud. The name is sometimes used to denote a raining cumulus, or cumulostratus.

    5. Cirro-cumulus. This form consists, like the cirrus, of thin, broken, fleecelice clouds, but the parts are more or less rounded and regulary grouped. It is popularly called mackerel sky.

    6. Cirro-stratus. In this form the patches of cirrus coalesce in long strata, between cirrus and stratus.

    7. Cumulo-stratus. A form between cumulus and stratus, often assuming at the horizon a black or bluish tint. -- Fog, cloud, motionless, or nearly so, lying near or in contact with the earth's surface. -- Storm scud, cloud lying quite low, without form, and driven rapidly with the wind.

  2. A mass or volume of smoke, or flying dust, resembling vapor. ``A thick cloud of incense.''
    --Ezek. viii. 11.

  3. A dark vein or spot on a lighter material, as in marble; hence, a blemish or defect; as, a cloud upon one's reputation; a cloud on a title.

  4. That which has a dark, lowering, or threatening aspect; that which temporarily overshadows, obscures, or depresses; as, a cloud of sorrow; a cloud of war; a cloud upon the intellect.

  5. A great crowd or multitude; a vast collection. ``So great a cloud of witnesses.''
    --Heb. xii. 1.

  6. A large, loosely-knitted scarf, worn by women about the head.

    Cloud on a (or the) title (Law), a defect of title, usually superficial and capable of removal by release, decision in equity, or legislation.

    To be under a cloud, to be under suspicion or in disgrace; to be in disfavor.

    In the clouds, in the realm of facy and imagination; beyond reason; visionary.

Cumulus

Cumulus \Cu"mu*lus\ (k[=u]"m[-u]*l[u^]s), n.; pl. Cumuli (-l[imac]). [L., a heap. See Cumber.] (Meteor.) One of the four principal forms of clouds. See Cloud.

Douglas Harper's Etymology Dictionary
cumulus

1650s, "a heap," from Latin cumulus "a heap, pile, mass, surplus," from PIE *ku-m-olo-, suffixed shortened form of root *keue- "to swell" (compare Sanskrit svayati "swells up, is strong," Greek kyein "to swell," Lithuanian šaunas "firm, solid, fit, capable"). Meteorological use for "rounded mass of clouds" first attested 1803.

Wiktionary
cumulus

n. 1 A large white puffy cloud that develops through convection. On a hot, humid day, they can form towers and even become cumulonimbus clouds. 2 A mound or heap.

WordNet
cumulus
  1. n. a globular cloud [syn: cumulus cloud]

  2. a collection of objects laid on top of each other [syn: pile, heap, mound]

  3. [also: cumuli (pl)]

Wikipedia
Cumulus (disambiguation)

Cumulus is a type of cloud with the appearance of a lump of cotton wool.

Cumulus may also refer to:

  • Cumulus Media, a radio broadcasting company
  • Cumulus Networks, a computer software company
  • Cumulus (software), digital asset management software developed by Canto Software
  • Reinhard Cumulus, glider
  • US Aviation Cumulus, motorglider
  • Cumulus oophorus, cells which surround a human egg after fertilisation
  • Cumulus (association), global association of universities and Colleges teaching art, design and media
Cumulus (software)

Cumulus is a digital asset management software designed as a client/server system developed by Canto Software. The product line includes editions targeted to smaller organizations and larger enterprises. The product makes use of metadata for indexing, organizing, and searching.

Cumulus servers run on Mac OS, Windows, and Linux systems. Cumulus client software is available for Mac, Windows and web browsers.

Usage examples of "cumulus".

At the same time I had always known that there were creatures of the middle air, weather gods, cumulus leviathans of ampere and spore who flailed their lives away at thirty thousand feet.

The landscape rushed past in a blur, then the scramjet kicked in just as they cleared the end of the launch rail and the Navatar stood the plane on its tail, rising vertically through a scattering of patchy cumulus clouds at roach seven going on seventeen.

Est ibi cumulus lapidum et unus lapis super-positus super congestum cum vestigia canis in eo.

The waxing moon, risen early, extruded ghostlike shafts through a gash in the cumulus.

Just east of the Mississippi, when cumulus clouds obscured his view, Surn went to sleep, awakening only when the green crests of the Smoky Mountains swelled beneath them, twenty thousand cloudless feet below.

There was a deck of cumulus far below but through big breaks, the pilots could see the deeply indented coastline of the Takao area and the big concrete airdrome of Einansho.

Then shadows moved up from the bruise-black depths, shading more and more of the writhing billows of cumulus and nimbus, finally climbing into the high cirrus and pond-rippled altocumulus, but at first the shadows brought not grayness or darkness, but an infinite palette of subtleties: gleaming gold dimming to bronze, pure white becoming cream and then dimming to sepia and shade, crimson with the boldness of spilled blood slowly darkening to the rust-red of dried blood, then fading to an autumnal tawny russet.

The cloud was broken cumulus, a legacy of the frontal system with endless altostratus riding on the cold air.

On the horizon fine streaks of cirrhous clouds were succeeded by masses of cumuli.

Certain other facts, however -- for example, that a cumulus or cirrostratus cloud floated over the scene of the crime on the day of a particular homicide, or that the telephone wires in front of the house where the crime took place are made of aluminum or copper -- can be classified as nonessential.

The columns and pillars were towering mountains of cumulus and cumulonimbus, their anvil-shaped bases disappearing in the darkening depths hundreds or thousands of kilometers below my floating kayak, their rounded summits billowing high into the halo-tinged cirrostratus hundreds or thousands of kilometers above me.

Over all the islands the trade wind blew white puffs of cumulus and the surf hammered patiently at the black rocks and white beaches.

Below, the late moon lighted a few puffs of cumulus, and the surf broke in delicate rings on the coral.

Darting out of the littoral cumulus buildup, the Security Bureau craft checked its position over a gutted and charred Nice, then climbed southeastward over the Mediterranean.

Lee and Johnson turned their Dauntlesses into fighters with guns at both ends, and in a wrapped-up, heavy-gutted, low-altitude swirl of wings and props and stringing tracers, with the horizon usually vertical and the ocean frequently overhead, shot down three of the overconfident Zeros before ducking into the friendly cumulus.