coil

noun

1.
a structure consisting of something wound in a continuous series of loops
querl helix spiral volute whorl
Derived from:
coil
2.
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
curl curlicue gyre ringlet roll scroll whorl
Derived from:
coil
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