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Longman Dictionary of Contemporary English
▪ Scientists say the average cirrus cloud cover over the United States has increased 5 percent since the 1960s.
▪ The sky is clear blue, with a few cirrus clouds adding texture to what looks like a flawless blue canvas.
The Collaborative International Dictionary

Cirrus \Cir"rus\, n.; pl. Cirri. [L., lock, curl, ringlet.]

  1. (Bot.) A tendril or clasper.

  2. (Zo["o]l.)

    1. A soft tactile appendage of the mantle of many Mollusca, and of the parapodia of Annelida. Those near the head of annelids are Tentacular cirri; those of the last segment are caudal cirri.

    2. The jointed, leglike organs of Cirripedia. See Annelida, and Polych[ae]ta.

      Note: In some of the inferior animals the cirri aid in locomotion; in others they are used in feeding; in the Annelida they are mostly organs of touch. Some cirri are branchial in function.

  3. (Zo["o]l.) The external male organ of trematodes and some other worms, and of certain Mollusca.

  4. (Meteor.) See under Cloud.


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.

Douglas Harper's Etymology Dictionary

1708, "curl-like fringe or tuft," from Latin cirrus "a lock of hair, tendril, curl, ringlet of hair; the fringe of a garment." In meteorology, cirrus clouds attested from 1803. So called from fancied resemblance of shape.


n. 1 (context botany English) A tendril. 2 (context zoology English) A thin tendril-like appendage. 3 (context meteorology English) A principal high-level cloud type characterised by white, delicate filaments or wisps, of white (or mostly white) patches, or of narrow bands, found at an altitude of above 7000 metres.

  1. n. usually coiled [syn: cirrhus]

  2. a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles) [syn: cirrus cloud]

  3. a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile

  4. [also: cirri (pl)]


Cirrus may refer to:

Cirrus (rocket)

The Cirrus is a sounding rocket with two stages, developed by the " Hermann Oberth Society". Its first launch was on September 16, 1961. The maximum height of the Cirrus, depending on the version, is 35 kilometres or 50 kilometres. A Cirrus rocket is exhibited at the Hermann Oberth Space Travel Museum in Feucht, Germany.

Category:Sounding rockets of Germany

Cirrus (album)

Cirrus is an album by American jazz vibraphonist Bobby Hutcherson recorded in 1974 and released on the Blue Note label.

Cirrus (song)

"Cirrus" is a 2013 instrumental performed, written and produced by British musician, producer and DJ Bonobo. Released as the first single from his fifth studio album The North Borders, the song did not chart but in 2014 the song was featured in a Vodafone advert. The song premiered on Giles Peterson's BBC Radio 6 show on 19 January 2013. It was released on 1 April 2013 worldwide and on 2 April 2013 in North America.

Cirrus (interbank network)

Cirrus is a worldwide interbank network operated by MasterCard Worldwide. Founded in 1982, it links MasterCard, Maestro, Diners Club credit, debit and prepaid cards to a network of over a million ATMs in 93 countries.

By default, Maestro cards are linked to the Cirrus network, but very often all three logotypes of the MasterCard family, MasterCard, Maestro and Cirrus, will be shown. Canadian, American, Venezuelan, Chilean and Saudi Arabian ATMs use this network alongside their local networks and many banks have adopted Cirrus as their international interbank network alongside either a local network, the rival Visa PLUS ATM network, or both. In locations such as India and Bangladesh, the Cirrus network also serves as a local interbank network as well as an international network.

Cirrus (Helsinki building)

Cirrus is a high-rise cooperative apartment building in Helsinki, the capital of Finland. Cirrus is the second tallest building in Finland with a height of 86 meters (282 feet). The building, which is located in Vuosaari in East Helsinki, has 28 floors (including two underground ones) and 140 apartments. The proposal for this building originally included a public observation terrace and cafe, but they were never built.

The building was designed by the Finnish architect company YIT Group and construction commenced in early 2005. The building reached its final height on 15 March 2006.

The roof was part of the setting of the music video of Finnish rock band Poets of the Fall's 2010 single Dreaming Wide Awake.

Cirrus (band)

Cirrus was an American big beat group formed in 1995 in Los Angeles, California. The group was composed of Aaron Carter and Stephen James Barry.

In live performances, the group often added live guitar and bass to the electronic background. Their single "Superstar DJ" brought them mainstream exposure, and in 1997 they released their debut album on Moonshine Music. They scored several dance hits in the US and Canada over the next five years. The song, "Back on a Mission" is featured in the film Mortal Kombat 2: Annihilation and also appears in the video games, Need for Speed: Underground 2 and Apocalypse.

Cirrus (crinoid)

A cirrus (plural cirri) is an articulated appendage projecting from an ossicle that forms part of the stalk of a crinoid. In sea lilies the stem forms a permanent attachment round which the cirri are arranged in whorls. The lowermost ones form a holdfast attaching the sea lily to the substrate.

During the development of comatulid crinoids (feather stars), the stalk is lost apart from its topmost segment which remains attached to the calyx (central disc). In these crinoids, the cirri are attached to this segment and project from the underside of the crown. There are usually many cirri and they are used to cling on to a hard surface or grip the substrate as the animal moves slowly about. In species that live on rocks they are robust and curved but in species that live on soft substrates they are long and slender.

Cirrus (biology)

A cirrus (pronounced , "", plural cirri, , ""), from the Latin cirrus meaning a curl-like tuft or fringe, is a term used in biology and zoology for a number of long, thin structures in both vertebrate and invertebrate animals. In the sheep liver fluke, for example, the cirrus is the worm's muscular penis and when not in use is retained within a cirrus sac or pouch near the animal's head. The same structure exists in the various Taenia species of tapeworm. In the Nereidae, however, the term cirrus refers to tentacular processes or growths on each of the feet (parpodia), either the dorsal cirrus or the ventral cirrus, and has nothing to do with reproduction. Among the ribbonworms, the caudal cirrus is a term for a small thread-like growth at the posterior end of the worm. Among the bristleworms, a cirrus is a tentacular growth near the head or notopodium containing sense organs and may be either dorsal, ventral, or lamellar. Among feather stars or barnacles, a cirrus is a long slender gripping or feeding appendage. In sea lilies, the cirri are the thin strands that line the animal's stalk. Among the tube blennies, a cirrus is a term for a long growth extending from above the eye (a supraorbital cirrus) or extending below the neck-region (a nuchal cirrus). In a nautilus, each of the animal's tentacles is composed of a thin flexible cirrus and the corresponding hardened and protective cirrus sheath into which the cirri may be withdrawn.

Cirrus (Seattle building)

Cirrus is a tall residential skyscraper in the Denny Triangle neighborhood of Seattle, Washington. The building, named after the cirrus cloud, has 39 floors and is located at the intersection of Westlake Avenue, 8th Avenue and Lenora Street. Construction on Cirrus, then known as 2030 8th Avenue, began in May 2013 and is expected to finish in 2015. The building was originally designed for condominiums but was reconfigured for smaller apartments by architects Weber Thompson after GID Development desired a move to the rental market.

The building opened in October 2015, with the average monthly rent for a 1-bedroom apartment at $2,903. GID Development is also developing a second apartment building named "Stratus" across Lenora Street from Cirrus.

Usage examples of "cirrus".

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.

Thin clouds like volcanic smoke, separated into cirri like sheep-skin: all said sign of heat.

Crossing her fingers in her mind, Cirri sent out her omnidirectional Bluetooth ID signal, itself limited to the same range as the iDream.

But in a situation like this, Cirri could only hope that the man who had sent her such an appealing iDream would be as receptive to her fantasies as she was to his.

When they had mutely acknowledged their kinship with a smile - the Chechen country-crunk music filling the club was amped up to 11, and made talking impossible - the guy nodded to Cirri that she should go first.

The fellow aimed his caster politely at Cirri, waiting one final moment for her to register some objection.

The commotion begins at the highest limits of the cirri, and even at greater elevations.

Its innocently white face, wreathed with snowy cirri and showing no trace of the ice ring or the catastrophe, gently swam through the void, pushing the blackness and the pale dust of the stars out of the frame of the screen.

There had been deaths, of course, to footholds lost, to viruses and bacteria of the hinterland, and to the depredations of the inland predators, animals that unfolded in claws, teeth, cirri, and killed.

These conditions are mainly in the arrangement of the lower rain-clouds in flakes thin and detached enough to be illuminated by early or late sunbeams: their textures are then more softly blended than those of the upper cirri, and have the qualities of painted, instead of burnished or inflamed, color.

How, for instance, in the upper cirri, a thousand little chills, alternating with a thousand little warmths, could stand still as a thousand little feathers.

There is no local reason assignable for the presence of the cirri above, or of the thundercloud below.

The blue sky is glossy and fat with heat, a few thin cirri sheared to blown strands like hair at the rims.

Far above me, feathered cirrus and rippled cirrocumulus caught the twilight in a pastel riot of soft pinks, rose glows, violet tinges, and golden backlighting.

Decks just above and below the atrium, which functioned as the midpoint in Cirrus, held the pricier, more respectable restaurants and stores.