COIL (3)

Coil, n. 1. 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. 2. Fig.: Entanglement; toil; mesh; perplexity.
3. 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.