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he·lix

(hēlĭks)

n. pl. he·lix·es or hel·i·ces (hĕl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.

v. he·lixed, he·lix·ing, he·lix·es

v.tr.

To move or position (something) into the shape of a helix.

v.intr.

1. To have the shape of a helix.

2. To move along a helical course; spiral.

[Latin, from Greek; see wel-² in the Appendix of Indo-European roots.]

(click for a larger image)

helix

in a right circular cylinder

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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