The Collaborative International Dictionary of English v.0.48:

Helix \He"lix\, n.; pl. L. Helices, E. Helixes. [L. helix,
   Gr. ?, ?, fr. ? to turn round; cf. L. volvere, and E. volute,
   voluble.]
   1. (Geom.) A nonplane curve whose tangents are all equally
      inclined to a given plane. The common helix is the curve
      formed by the thread of the ordinary screw. It is
      distinguished from the spiral, all the convolutions of
      which are in the plane.
      [1913 Webster]

   2. (Arch.) A caulicule or little volute under the abacus of
      the Corinthian capital.
      [1913 Webster]

   3. (Anat.) The incurved margin or rim of the external ear.
      See Illust. of Ear.
      [1913 Webster]

   4. (Zool.) A genus of land snails, including a large number
      of species.
      [1913 Webster]

   Note: The genus originally included nearly all shells, but is
         now greatly restricted. See Snail, Pulmonifera.
         [1913 Webster]

WordNet (r) 3.0 (2006):

helix
    n 1: a curve that lies on the surface of a cylinder or cone and
         cuts the element at a constant angle [syn: helix,
         spiral]
    2: a structure consisting of something wound in a continuous
       series of loops; "a coil of rope" [syn: coil, spiral,
       volute, whorl, helix]
    3: type genus of the family Helicidae [syn: Helix, genus
       Helix]

Moby Thesaurus II by Grady Ward, 1.0:

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



The Free On-line Dictionary of Computing (30 December 2018):

Helix

   A hardware description language from Silvar-Lisco.


U.S. Gazetteer Places (2000):

Helix, OR -- U.S. city in Oregon
   Population (2000):    183
   Housing Units (2000): 68
   Land area (2000):     0.114338 sq. miles (0.296135 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.114338 sq. miles (0.296135 sq. km)
   FIPS code:            33250
   Located within:       Oregon (OR), FIPS 41
   Location:             45.850847 N, 118.658297 W
   ZIP Codes (1990):     97835
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Helix, OR
    Helix