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   helix

   /ˈhiːlɪks/

   noun

   • 1. an object having a three-dimensional shape like that of a wire wound uniformly in a single layer around a cylinder or cone, as in a corkscrew or spiral staircase.
   • ▪ a curve on a conical or cylindrical surface which would become a straight line if the surface were unrolled into a plane.
   • ▪ an extended spiral chain of atoms in a protein, nucleic acid, or other polymeric molecule.
   • ▪ a spiral ornament.
   • 2. the rim of the external ear.

   Word Origin mid 16th century (in the architectural sense ‘spiral ornament’): via Latin from Greek.

   Scrabble Points: 15

   • H

     4

   • E

     1

   • L

     1

   • I

     1

   • X

     8

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