Definition of "Coil" :

noun: a structure consisting of something wound in a continuous series of loops

"A coil of rope."

noun: reactor consisting of a spiral of insulated wire that introduces inductance into a circuit

noun: tubing that is wound in a spiral

noun: a contraceptive device placed inside a woman's womb

noun: a transformer that supplies high voltage to spark plugs in a gasoline engine

noun: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)

verb: wind around something in coils or loops

verb: make without a potter's wheel

verb: to wind or move in a spiral course

"The muscles and nerves of his fine drawn body were coiling for action."