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In mathematics, a differential operator that can be applied to a vector-valued function (or vector field) in order to measure its degree of local spinning. It consists of a combination of the function's first partial derivatives. One of the more common forms for expressing it is: in which v is the vector field (v₁, v₂, v₃), and v₁, v₂, v₃ are functions of the variables , , and , and i, j, and k are unit vectors in the positive , , and directions, respectively. In fluid mechanics, the curl of the fluid velocity field (i.e., vector velocity field of the fluid itself) is called the vorticity or the rotation because it measures the field's degree of rotation around a given point.

For more information on curl, visit Britannica.com.

(1) A programming environment for developing rich Internet applications (RIAs) from Curl, Inc., Cambridge, MA (www.curl.com). Conceived at MIT, Curl combines HTML markup with an object-oriented programming language. The user's machine requires the Curl runtime engine and browser plug-in for execution. The first Curl implementation was released in 2002. See RIA.

(2) (cURL) A command line utility for executing functions with URL-oriented protocols such as FTP and HTTP. Pronounced "C-URL," there are versions for Unix, Linux, Windows, Mac and other operating systems. For more information, visit http://curl.haxx.se.

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Rippling effect on paper caused inadvertently by exposure to moisture or by coating one side of the paper. See also coated paper.

verb

1. To have or cause to have a curved or sinuous form or surface: curve, undulate, wave. See straight/bent.
2. To move or proceed on a repeatedly curving course: coil, corkscrew, entwine, meander, snake, spiral, twine, twist, weave, wind, wreathe. See repetition, straight/bent.

Definition: loop, ringlet, curve
Antonyms: line

v

Definition: bend, loop
Antonyms: straighten

A winding, swirling, or circling in the grain of wood, usually obtained from the crotch or fork of a tree; also see fiddleback.

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• Surfing

Look up curl in Wiktionary, the free dictionary.

Curl or CURL may refer to:

• Curl (mathematics), a vector operator that shows a vector field's rate of rotation
• Biceps curl or wrist curl, weight training exercises
• Curl or executive curl, the ring above a naval officer's gold lace or braid rank insignia

In technology

• Curl (programming language), an object-oriented programming language designed for interactive Web content
• cURL, a command line tool for transferring files
• The NATO reporting name for the Antonov An-26 aircraft

Other

• Consortium of University Research Libraries, an association of UK academic and research libraries
• Curl (football), is spin on a football, which will make it swerve when kicked
• Rod Curl (born 1943), American professional golfer

See also

• Curling (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)

Dansk (Danish)
v. tr. - krølle, sno, fortrække i et hånligt smil
v. intr. - krølle, kruse sig, spille curling, sno sig, danne spiraler, fortrække sig i et hånligt smil
n. - krølle, snoning, krusning, krøl, krøllesyge

idioms:

• curl into    fortrække sig i
• curl up    sidde med benene trukket op under sig, krumme sig sammen

Nederlands (Dutch)
(om-/op)krullen, kringelen, curling spelen, (haar)krul, krullende beweging/handeling, krulziekte

Français (French)
v. tr. - friser, saisir (qch), se pelotonner, s'enrouler autour de qch, faire une moue dédaigneuse
v. intr. - friser, se gondoler, se racornir, monter en volutes (fumée), s'enrouler autour, faire une moue dédaigneuse
n. - boucle, anneau, copeau, volute, moue dédaigneuse

idioms:

• curl into a ball    s'enrouler en boule
• curl up    se pelotonner, se mettre en rond, se gondoler, se racornir, gondoler, racornir, se recroqueviller

Deutsch (German)
v. - sich locken, sich wellen, kräuseln, locken
n. - Locke

idioms:

• curl into a ball    zu Kuglen oder Ballen formen
• curl up    sich zusammenkugeln

Ελληνική (Greek)
v. - κατσαρώνω, σγουραίνω, συστρέφω/-ομαι, περιελίσσω/-ομαι, (καθομ.) μουτρώνω, στραβομουτσουνιάζω
n. - μπούκλα, βόστρυχος, τολύπη, τούφα, σπείρωμα, ελίκωση, (μτφ.) στραβομουτσούνιασμα

idioms:

• curl into    κουλουριάζομαι, συστρέφομαι σε (π.χ. μπάλα)
• curl up    κουλουριάζω/-ομαι, (καθομ.) χουζουρεύω (σε πολυθρόνα κ.λπ.), καταρρέω

Italiano (Italian)
arricciarsi, serpeggiare, increspare, arricciare, ricciolo

idioms:

• curl into    raggomitolarsi in
• curl up    raggomitolarsi

Português (Portuguese)
v. - enrolar
n. - cacho (m)

idioms:

• curl into    enrolar
• curl up    enrolar-se, fraquejar (gír.)

Русский (Russian)
виться, сворачиваться, завивать, локон, завиток

idioms:

• curl into    свернуться
• curl up    свернуться в клубок, уютно устроиться

Español (Spanish)
v. tr. - rizar, ensortijar
v. intr. - arrollarse, fruncirse, encresparse, ensortijarse, rizarse, hacer rollos, bucles, o rizos
n. - rizo, bucle

idioms:

• curl into a ball    aovillarse, hacerse un ovillo
• curl up    enroscarse, acurrucarse, repantigarse, ondularse

Svenska (Swedish)
v. - krulla, krusa, kröka, förvrida, sno, slå knorr på, falla ihop/till föga (vard.), spela curling
n. - hårlock, ring, krusning, lockighet, bladrullsjuka (hos potatis)

中文（简体）(Chinese (Simplified))
使卷曲, 使卷起来, 缠绕, 卷曲, 缭绕, 卷毛, 卷发, 螺旋状物

idioms:

• curl into    卷起来
• curl up    卷起

中文（繁體）(Chinese (Traditional))
v. tr. - 使捲曲, 使卷起來, 纏繞
v. intr. - 捲曲, 繚繞
n. - 卷毛, 捲髮, 捲曲, 螺旋狀物

idioms:

• curl into    捲起來
• curl up    捲起

한국어 (Korean)
v. tr. - 곱슬곱슬하게 하다, 물결이 일게 하다
v. intr. - 곱슬곱슬해지다, 비틀리다, 꽁무니를 빼다
n. - 고수머리, 소용돌이 , 비틀림

idioms:

• curl into    몸을 동그랗게 말다
• curl up    감아올리다, 쓰러뜨리다

日本語 (Japanese)
n. - カール, 巻毛の頭髪, らせん状のもの, 巻きひげ, カーリング病, 回転, カールすること
v. - カールさせる, ひねる, カールする, 渦巻く, しりごみする

idioms:

• curl into    曲がりくねる
• curl up    端から巻き上げる, 倒す, 吐き気を催させる

العربيه (Arabic)
‏(فعل) جعد, تجعد, تكور, انطوى (الاسم) تجعيدة‏

עברית (Hebrew)
v. tr. - ‮סלסל, עיוות (בבוז את השפה העליונה)‬
v. intr. - ‮התאבך, הסתלסל‬
n. - ‮תלתל, סליל, סלסול, מחלת התכדרות העלים בצמחים‬

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