The Collaborative International Dictionary of English v.0.48:

curlicue \curl"i*cue\ (k?rl"?-k?), n. [Cf. F. caracole.]
   Some thing curled or spiral, as a flourish made with a pen on
   paper, or with skates on the ice; a trick; a frolicsome
   caper. [Sometimes written curlycue or carlicue.] [
   Colloq. U.S.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

curlicue
    n 1: a round shape formed by a series of concentric circles (as
         formed by leaves or flower petals) [syn: coil, whorl,
         roll, curl, curlicue, ringlet, gyre, scroll]
    2: a short twisting line [syn: squiggle, curlicue]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "curlicue":
   cirrus, coil, corkscrew, curl, evolute, gyre, helix, involute,
   kink, ringlet, roll, screw, scroll, spiral, swirl, tendril, twirl,
   twist, volute, volution, vortex, whirl, whorl