Coil
# Coil

Coil or COIL may refer to:

## Geometry

* Helix, a space curve that winds around a line
* Spiral, a curve that winds around a central point

## Science and technology

* Coil (chemistry), a tube used to cool and condense steam from a distillation
* Coil spring, used to store energy, absorb shock, or maintain a force between two surfaces
* Inductor or coil, a passive two-terminal electrical component
* Electromagnetic coil, formed when a conductor is wound around a core or form to create an inductor or electromagnet
   * Induction coil, a type of electrical transformer used to produce high-voltage pulses from a low-voltage direct current supply
      * Ignition coil, used in internal combustion engines to create a pulse of high voltage for a spark plug
* Intrauterine device or coil, a contraceptive device
* Chemical oxygen iodine laser, a near–infrared chemical laser
* Coil, a binary digit or bit in some communication protocols such as Modbus
* COIL, the gene that encodes the protein coilin
* Coiled tubing, a long metal pipe which is supplied spooled on a large reel

## Music

* Coil (band), an English experimental band
* Coil (album), a 1997 album by Toad the Wet Sprocket
* "Coil", a song by Opeth from Watershed

## Fictional entities

* The Coil, a fictional organization in the G.I. Joe universe
* Magnemite or Coil, a Pokémon character
* Coil, a crime lord from the web serial Worm

## People with the surname

* Liam Mac Cóil, Irish novelist

## Other uses

* Coil (hieroglyph), an Egyptian hieratic hieroglyph
* Coiled basketry, using grasses, rushes and pine needles
* Coiling (pottery), a method of creating pottery
* Coil (video game), a video game by Edmund McMillen and Florian Himsl
* Turmoil or burden, as in mortal coil
* Coiling, a method for storing rope or cable
