spi·ral (sprl)

a. A curve on a plane that winds around a fixed center point at a continuously increasing or decreasing distance from the point.
b. A three-dimensional curve that turns around an axis at a constant or continuously varying distance while moving parallel to the axis; a helix.
c. Something having the form of such a curve: a spiral of black smoke.
2. Printing A spiral binding.
3. The course or flight path of an object rotating on its longitudinal axis.
4. A continuously accelerating increase or decrease: the wage-price spiral.
1. Of or resembling a spiral.
2. Circling around a center at a continuously increasing or decreasing distance.
3. Coiling around an axis in a constantly changing series of planes; helical.
4. Printing Relating to or having a spiral binding: a spiral notebook.
v. spi·raled also spi·ralled, spi·ral·ing also spi·ral·ling, spi·rals also spi·rals
1. To take a spiral form or course.
2. To rise or fall with steady acceleration.
To cause to take a spiral form or course.

[Medieval Latin spiralis, of a spiral, from Latin spira, coil.]
spi·rali·ty n.
spiral·ly adv.

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