What is the meaning of coil?

noun

• A structure consisting of something wound in a continuous series of loops.
  • usage: "a coil of rope"
  • synonyms: spiral, volute, whorl, helix
• A round shape formed by a series of concentric circles (as formed by leaves or flower petals.
  • synonyms: whorl, roll, curl, curlicue, ringlet, gyre, scroll
• A transformer that supplies high voltage to spark plugs in a gasoline engine.
• A contraceptive device placed inside a woman's womb.
• Tubing that is wound in a spiral.
• Reactor consisting of a spiral of insulated wire that introduces inductance into a circuit.

verb

• To wind or move in a spiral course.
  • usage: "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"
  • synonyms: gyrate, spiral
• Make without a potter's wheel.
  • usage: "This famous potter hand-builds all of her vessels"
  • synonyms: handbuild, hand-build
• Wind around something in coils or loops.
  • synonyms: loop, curl