Coil Knot

A coil is a series of loops or a spiral.

Coil may also refer to:

• Mountaineer's coil, a knot used in climbing
• Butterfly coil, a knot used in climbing
• Coil, a binary digit or bit in some communication protocols such as Modbus
• Coil binding (or spiral binding), a commonly used book binding style for creating documents, reports, presentations, and proposals
• Coilgun, a hypothetical projectile weapon
• Coil stamp, a type of postage stamp sold as strips one stamp wide
• Coil spring, a type of mechanical spring
• Coiled tubing, tubing used in oil and gas wells stored in a coil
• Coiling (pottery), a method of creating pottery
• Coil (hieroglyph), an Egyptian language hieroglyph
• Mortal coil, the troubles of daily life and the strife and suffering of the world

In medicine:

• Endovascular coiling, or endovascular embolization, a surgical treatment for cerebral aneurysms.
• Guglielmi Detachable Coil, a platinum coil commonly used in intracranial non-invasive surgery, for the occlusion of brain aneurysms
• Coil, a colloquial term for an intrauterine device

In chemistry:

• Coil (chemistry), a tube, frequently in spiral form, used as a condenser
• Coiled coil, a motif in protein structure
• Random coil, a conformation of a polymer

As an abbreviation, COIL:

• Chemical Oxygen Iodine Laser
• Coilin, a protein that in humans is encoded by the COIL gene

In fiction:

• Coil, the original and Japanese name for the fictional Pokémon character Magnemite
• The Coil, offshoot of the Cobra Terrorist Organization in the fictional G.I. Joe universe
• Warp coil, a component in the fictional Star Trek universe's warp drive

In music:

• Coil (band), an English experimental band
• Coil (album), a 1997 album by Toad the Wet Sprocket
• Icon of Coil, a Norwegian electronic body music band
• Lacuna Coil, an Italian goth heavy metal band
• Coil (song), from the album Watershed by Opeth

In electrical components (alphabetical):

• Balun, a transformer that matches differing impedance transmission lines and/or balanced to or from unbalanced transmission lines
• Bifilar coil, employs two parallel windings
• Barker coil, in low-field NMR imaging
• Coilgun, a type of cannon that uses a series of electromagnetic coils to accelerate a magnetic shell to very high velocities
• Degaussing coil, in the process of removing permanent magnetism (magnetic hysteresis) from an object
• Choke coil, used to block alternating current while passing direct current
• Garrett coil, in a metal detector
• Helmholtz coil, a device for producing a region of nearly uniform magnetic field
• Hybrid coil, a single transformer that effectively has three windings
• Incandescent light bulb filament, usually has the shape of a coiled coil in order to fit the long filament in a small space
• Ignition coil (or induction coil), an electrical device in common use as the ignition system ("ignition coil" or "spark coil") of internal-combustion engines
• Inductor
• Loading coil, inserted in a circuit to increase its inductance; archaically called "Pupin coils"
• Maxwell coil, a device for producing almost a constant magnetic field
• Multiple coil magnet, an electromagnet that has several coils of wire connected in parallel
• Oudin coil, a spark-producing coil
• Polyphase coil, connected together in a polyphase system such as a generator or motor
• Relay coil, the copper winding part of a relay that produces a magnetic field that actuates the mechanism
• Repeating coil, a voice-frequency transformer
• Rogowski coil, an electrical device for measuring alternating current
• Single coil, a type of pickup for the electric guitar
• Solenoid, a mechanical device based on a coil of wire that usually converts energy into linear motion
• Telephone cord, usually manufactured in a coiled fashion, as to allow maximum length while taking up minimum space when not in use
• Tesla coil, a category of disruptive discharge coils, usually denoting a resonant transformer that generates very high voltages at radio frequencies
• Voice coil, mounted to the moving cone of a loudspeaker