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.
- 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.
- A spiral form or structure.
- Anatomy The folded rim of skin and cartilage around most of the outer ear.
- Architecture A volute on a Corinthian or Ionic capital.