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helix

helix


he·lix    Audio Help   (hē'lĭks)   

n.   pl. he·lix·es or hel·i·ces (hěl'ĭ-sēz', hē'lĭ-)

  1. Mathematics A three-dimensional curve that lies on a cylinder or cone, so that its angle to a plane perpendicular to the axis is constant.

  2. A spiral form or structure.

  3. Anatomy The folded rim of skin and cartilage around most of the outer ear.

  4. Architecture A volute on a Corinthian or Ionic capital.


[Latin, from Greek; see wel-2 in Indo-European roots.]
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The American Heritage® Dictionary of the English Language, Fourth Edition
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