coil1
n.
- a length of something wound in a joined sequence of concentric rings.
- an intrauterine contraceptive device in the form of a coil.
- an electrical device consisting of a coiled wire, for converting the level of a voltage, producing a magnetic field, or adding inductance to a circuit.
v.
arrange or form into a coil.
Etymology
C16: from OFr. coillir, from L. colligere (see collect1).