The IUD or 'coil ' is a small plastic (or plastic and copper) device, not much longer than a match, which is placed inside your womb, where it prevents you from getting pregnant.

Look up coil in Wiktionary, the free dictionary.

Coil, in an electric circuit, one or more turns, usually roughly circular or cylindrical, of current-carrying wire designed to produce a magnetic field or to provide electrical resistance or …

A coil of rope lay on the beach. A coil of thick blue smoke rose up from his pipe.

COIL definition: a connected series of spirals or rings that rope, wire, or the like has been formed into. See examples of coil used in a sentence.

1. to wind into continuous rings one above the other or one around the other. 2. to gather (rope, wire, etc.) into loops: Coil the garden hose and hang it up.

The coil is a contraceptive device used by women. It is fitted inside a woman's womb, usually for several months or years.