- a spiral.
- the curve formed by a straight line drawn on a plane when that plane is wrapped around a cylindrical surface of any kind, especially a right circular cylinder, as the curve of a screw. Equation: x = a sinθ, y = a cosθ, z = b θ.
- Architecture.
- a spiral ornament.
- (in a Corinthian capital) either of two scrolls issuing from a cauliculus.
- the curved fold forming most of the rim of the external ear.
- alpha helix.
- a curve that lies on a cylinder or cone, at a constant angle to the line segments making up the surface; spiral
- a spiral shape or form
- the incurving fold that forms the margin of the external ear
- another name for volute (def. 2)
- any terrestrial gastropod mollusc of the genus Helix, which includes the garden snail (H. aspersa)
