n.

1. a structure consisting of something wound in a continuous series of loops;
   spiral, volute, whorl, helix
   
   • a coil of rope
2. a round shape formed by a series of concentric circles (as formed by leaves or flower petals);
   whorl, roll, curl, curlicue, ringlet, gyre, scroll
3. a transformer that supplies high voltage to spark plugs in a gasoline engine
4. a contraceptive device placed inside a woman's womb
5. tubing that is wound in a spiral
6. reactor consisting of a spiral of insulated wire that introduces inductance into a circuit

v.

1. to wind or move in a spiral course;
   gyrate, spiral
   
   • the muscles and nerves of his fine drawn body were coiling for action
   • black smoke coiling up into the sky
   • the young people gyrated on the dance floor
2. make without a potter's wheel;
   handbuild, hand-build
   
   • This famous potter hand-builds all of her vessels
3. wind around something in coils or loops;
   loop, curl