A curving inwards; the condition of being curved inwards.
The act of acquiring or being given a curved form; an instance of curving or bending.
The state of being curved or bent; any curved shape or formation; curvature; a curve; a bend.
A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.
A helix.
A section of track that forms a circle and crosses over itself, used for gaining height in mountainous territory.
A self-sustaining process with a lot of momentum involved, so it is difficult to accelerate or stop it at once.
To increase continually.
To cause something to spiral.
To move along the path of a spiral or helix.
Helical, like a spiral.