Webster's Revised Unabridged Dictionary · 1913

Coil

Coil (koil) , transitive verb

[Old French coillir, French cueillir, to collect, gather together, Latin coligere; col- + legere to gather. See Legend, and compare Cull, transitive verb, Collect.]

1.
To wind cylindrically or spirally; as, to coil a rope when not in use; the snake coiled itself before springing.
2.
To encircle and hold with, or as with, coils. [Obsolete or Rare] — T. Edwards

Coil , intransitive verb

To wind itself cylindrically or spirally; to form a coil; to wind; -- often with about or around.
You can see his flery serpents... Coiting, playing in the water. — Longfellow

Coil , noun

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.
Figuratively: Entanglement; toil; mesh; perplexity.
3.
A series of connected pipes in rows or layers, as in a steam heating apparatus.
Collocations (2)
Induction coil (Electricity) , See under Induction.
Ruhmkorff's coil (Electricity) , an induction coil, sometimes so called from Ruhmkorff ({not transcribed}), a prominent manufacturer of the apparatus.

Coil , noun

[Of Celtic origin; compare Gael. goil fume, rage.]

A noise, tumult, bustle, or confusion. [Obsolete] — Shakespeare