The Collaborative International Dictionary of English v.0.48:

Coil \Coil\ (koil), v. t. [imp. & p. p. Coiled (koild); p. pr.
   & vb. n. Coiling.] [OF. coillir, F. cueillir, to collect,
   gather together, L. coligere; col- + legere to gather. See
   Legend, and cf. Cull, v. t., Collect.]
   1. To wind cylindrically or spirally; as, to coil a rope when
      not in use; the snake coiled itself before springing.
      [1913 Webster]

   2. To encircle and hold with, or as with, coils. [Obs. or R.]
      --T. Edwards.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

coiling \coiling\ adj.
   1. 1

   Syn: helical, spiral, spiraling, volute, voluted, whorled.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

coiling
    adj 1: in the shape of a coil [syn: coiling, helical,
           spiral, spiraling, volute, voluted, whorled,
           turbinate]