Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

   3. (Anat.) The incurved margin or rim of the external ear.
      See Illust. of {Ear}.

   4. (Zo["o]l.) A genus of land snails, including a large
      number of species.

   Note: The genus originally included nearly all shells, but is
         now greatly restricted. See {Snail}, {Pulmonifera}.

Source : WordNet®

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

Source : Free On-Line Dictionary of Computing

Helix
     
        A {hardware description language} from {Silvar-Lisco}.