Coil, n. 1. A ring, series of rings, or spiral, into which a rope, or other like thing, is wound.
The wild grapevines that twisted their coils from trec to tree.
W. Irving.
2. Fig.: Entanglement; toil; mesh; perplexity.
3. A series of connected pipes in rows or layers, as in a steam heating apparatus.
Induction coil. (Elec.) See under Induction. — Ruhmkorff's coil(Elec.), an induction coil, sometimes so called from Ruhmkorff (�), a prominent manufacturer of the apparatus.