- Something wound in the form of a helix or spiral.
- Common name for any intra-uterine contraceptive device (Abbreviation: IUD)—the first IUDs were coil-shaped.
- (electrical) A coil of electrically conductive wire through which electricity can flow.
- To wind or reel e.g. a wire or rope into regular rings, often around a centerpiece.
Etymology: From coillir (French: cueillir), from colligere.
- A simple transformer can be made by coiling two pieces of insulated copper wire around an iron heart.
- To wind into loops (roughly) around a common center.
- The sailor coiled the free end of the hawser on the pier.
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Full Definition of coil