coil definition | Dictionary.com

coil

1 [koil]

–verb (used with object)

1.	to wind into continuous, regularly spaced rings one above the other: to coil a wire around a pencil.

2.	to wind on a flat surface into rings one around the other: He coiled the rope on the deck.

3.	to gather (rope, wire, etc.) into loops: She coiled the garden hose and hung it on the hook.

–verb (used without object)

4.	to form rings, spirals, etc.; gather or retract in a circular way: The snake coiled, ready to strike.

5.	to move in or follow a winding course: The river coiled through the valley.

–noun

6.	a connected series of spirals or rings into which a rope or the like is wound.

7.	a single such ring.

8.	an arrangement of pipes, coiled or in a series, as in a radiator.

9.	a continuous pipe having inlet and outlet, or flow and return ends.

10.	Medicine/Medical. an intrauterine device.

11.

Electricity.

a.	a conductor, as a copper wire, wound up in a spiral or other form.

b.	a device composed essentially of such a conductor.

c.	ignition coil.

12.

Philately.

a.	a stamp issued in a roll, usually of 500 stamps, and usually perforated vertically or horizontally only.

b.	a roll of such stamps.

Origin:
1605–15; perh. var. of cull

Related forms:

coil⋅a⋅ble, adjective

coil⋅a⋅bil⋅i⋅ty, noun

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coil

2 [koil]

–noun

1.	a noisy disturbance; commotion; tumult.

2.	trouble; bustle; ado.

Origin:
1560–70; orig. uncert.

ignition coil

–noun

(in an automotive ignition system) a transformer consisting of two wire windings or coils in which low-voltage direct current is fed through the primary winding to generate high-voltage spark pulses in the secondary winding.

Also called coil.

Origin:
1895–1900

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To coil

coil¹ (koil)

1. A series of connected spirals or concentric rings formed by gathering or winding: a coil of rope; long coils of hair.
2. An individual spiral or ring within such a series.
3. A wound spiral of two or more turns of insulated wire, used to introduce inductance into a circuit.
4. Any of various devices of which such a spiral is the major component.
A spiral pipe or series of spiral pipes, as in a radiator.
Electricity
1. A wound spiral of two or more turns of insulated wire, used to introduce inductance into a circuit.
2. Any of various devices of which such a spiral is the major component.
A roll of postage stamps prepared for use in a vending machine.

v. coiled, coil·ing, coils

v. tr.

To wind in concentric rings or spirals.
To wind into a shape resembling a coil.

v. intr.

To form concentric rings or spirals.
To move in a spiral course: black smoke coiling up into the sky.

[Probably from obsolete French coillir, to gather up, from Latin colligere; see collect¹.]
coil'er n.

coil² (koil)

n. A disturbance; a fuss.

[Origin unknown.]

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Coil

Coil\ (koil), v. t. [imp. & p. p. Coiled (koild); p. pr. & vb. n. Coiling.] [OF. coillir, F. cueillir, to collect, gather together, L. coligere; col- + legere to gather. See Legend, and cf. Cull, v. t., Collect.]

1. To wind cylindrically or spirally; as, to coil a rope when not in use; the snake coiled itself before springing.

2. To encircle and hold with, or as with, coils. [Obs. or R.] --T. Edwards.

Coil

Coil\, v. i. To wind itself cylindrically or spirally; to form a coil; to wind; -- often with about or around.

You can see his flery serpents . . . Coiting, playing in the water. --Longfellow.

Coil

Coil\, n. 1. A ring, series of rings, or spiral, into which a rope, or other like thing, is wound.

The wild grapevines that twisted their coils from trec to tree. --W. Irving.

2. Fig.: Entanglement; toil; mesh; perplexity.

3. A series of connected pipes in rows or layers, as in a steam heating apparatus.

Induction coil. (Elec.) See under Induction.

Ruhmkorff's coil (Elec.), an induction coil, sometimes so called from Ruhmkorff, a prominent manufacturer of the apparatus.

Coil

Coil\, n. [Of Celtic origin; cf. Gael. goil fume, rage.] A noise, tumult, bustle, or confusion. [Obs.] --Shak.

Language Translation for : coil

Spanish: enroscarse,

German: (sich) winden,

Japanese: ぐるぐる巻く

More Translations »

coil

1611, from M.Fr. coillir "to gather, pick," from L. colligere "to gather together" (see collect). Meaning specialized perhaps in nautical usage.

coil

See triangle.

COIL
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coil

in an electric circuit, one or more turns, usually roughly circular or cylindrical, of current-carrying wire designed to produce a magnetic field or to provide electrical resistance or inductance; in the latter case, a coil is also called a choke coil (see also inductance). A soft iron core placed within a coil produces an electromagnet. A cylindrical coil that moves a plunger within it by variations in the current through the coil is known as a solenoid (q.v.).

Learn more about coil with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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