Curl

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Related to curled: Curled hair, curled up

curl

Maths a vector quantity associated with a vector field that is the vector product of the operator ∇ and a vector function A, where ∇ = i∂/∂x + j∂/∂by + k∂/∂z, i, j, and k being unit vectors. Usually written curl A, rot A

Curl

 

of a vector field A, the vector characteristic of a “rotating component” of field A. The curl is represented by the symbol rot A. It can be interpreted in the following manner: Let A be the velocity field of a fluid flow. At a given point of the flow we place a small wheel with blades and orient its axis in the direction of rot A at that point. Then the angular velocity of the wheel’s rotation from the action of the current will be maximum, and its value will equal (| rot A |)/2. If the field A has the coordinates P(x, y, z), Q(x, y, z), and R(x, y, z), then the curl has the coordinates

E. G. POZNIAK

curl

[kərl]
(forestry)
A block of timber cut from a crotch for cutting into veneers.
(materials)
A defect of paper caused by unequal alteration in the dimensions of the top and underside of the sheet.
(mathematics)
The curl of a vector function is a vector which is formally the cross product of the del operator and the vector. Also known as rotation (rot).

curl

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

Curl

(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.
References in classic literature ?
He glanced at the Indian sleeping beside him, at the embers of the dying fire, at the five dogs beyond, with their wolf's brushes curled over their noses, and at the four snowshoes standing upright in the snow.
(fine girls of sixteen and seventeen) had grey beaver hats, then in fashion, shaded with ostrich plumes, and from under the brim of this graceful head-dress fell a profusion of light tresses, elaborately curled; the elder lady was enveloped in a costly velvet shawl, trimmed with ermine, and she wore a false front of French curls.
Because of the ridges on the wand, the finish was different on every section I curled, which gave it a really natural finish.
"If you've got good, healthy curly hair, the styling options are endless and that slightly curled or relaxed hair look is very much on-trend.
Repeat with each section, until your whole head is curled.
However, television coverage of curling, especially at the 2010 Winter Olympics - which included extensive air time on cable TV - helped give the sport a new following that even curled its way to Petersham.
When doing a bicep curl with a barbell, arms should start straight and elbows into the body, the bar should then be curled up slowly, and lowered in the same manner, keeping the elbows stationary.