|to bark; yelp.|
|to spend time idly; loaf.|
|1.||geometry one of several plane curves formed by a point winding about a fixed point at an ever-increasing distance from it. Polar equation of Archimedes spiral:r = aθ; of logarithmic spiral: log r = aθ; of hyperbolic spiral:rθ = a, (where a is a constant)|
|2.||another name for helix|
|3.||something that pursues a winding, usually upward, course or that displays a twisting form or shape|
|4.||Compare spin a flight manoeuvre in which an aircraft descends describing a helix of comparatively large radius with the angle of attack within the normal flight range|
|5.||economics a continuous upward or downward movement in economic activity or prices, caused by interaction between prices, wages, demand, and production|
|6.||having the shape of a spiral|
|—vb , -rals, -ralling, -ralled, -rals, -raling, -raled|
|7.||to assume or cause to assume a spiral course or shape|
|8.||(intr) to increase or decrease with steady acceleration: wages and prices continue to spiral|
|[C16: via French from Medieval Latin spīrālis, from Latin spīra a coil; see |
spiral spi·ral (spī'rəl)
Coiling or developing around an axis in a constantly changing series of planes; helical. n.
A structure in the shape of a coil. v. spi·raled or spi·ralled, spi·ral·ing or spi·ral·ling, spi·rals or spi·rals
To take the form or course of a spiral.
plane curve that, in general, winds around a point while moving ever farther from the point. Many kinds of spiral are known, the first dating from the days of ancient Greece. The curves are observed in nature, and human beings have used them in machines and in ornament, notably architectural-for example, the whorl in an Ionic capital. The two most famous spirals are described below.
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