A Helix

1. (mathematics) A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase.
2. (architecture) A small volute under the abacus of a Corinthian capital.
3. (anatomy) The incurved rim of the external ear.
4. An upside down midair 360° spin in playboating.

Synonyms

• (curve): spiral (not in technical use)