spiral

/'spaiərəl/
Adjective
  1. in the shape of a coil
Noun
  1. flying downward in a helical path with a large radius
  2. a structure consisting of something wound in a continuous series of loops
    • a coil of rope
  3. ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center
  4. a continuously accelerating change in the economy
  5. a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
  6. a plane curve traced by a point circling about the center but at increasing distances from the center
Verb
  1. move in a spiral or zigzag course
  2. form a spiral
    • The path spirals up the mountain
  3. to wind or move in a spiral course
    • the muscles and nerves of his fine drawn body were coiling for action
    • black smoke coiling up into the sky
    • the young people gyrated on the dance floor

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spiral
A seashell rests on the sand, its surface marked by a perfect spiral.