Source : WordNet®

spiral
     adj : in the shape of a coil [syn: {coiling}, {helical}, {spiraling},
            {volute}, {voluted}, {whorled}, {turbinate}]
     [also: {spiralling}, {spiralled}]

spiral
     n 1: a plane curve traced by a point circling about the center
          but at ever-greater distances from it
     2: a curve that lies on the surface of a cylinder or cone and
        cuts the element at a constant angle [syn: {helix}]
     3: ornament consisting of a curve on a plane that winds around
        a center with an increasing distance from the center [syn:
         {volute}]
     4: a structure consisting of something wound in a continuous
        series of loops; "a coil of rope" [syn: {coil}, {volute},
        {whorl}, {helix}]
     5: flying downward in a helical path with a large radius
     [also: {spiralling}, {spiralled}]

spiral
     v 1: 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" [syn: {gyrate}, {coil}]
     2: form a spiral; "The path spirals up the mountain"
     3: move in a spiral or zigzag course [syn: {corkscrew}]
     [also: {spiralling}, {spiralled}]

spiralling
     See {spiral}