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spiral |
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spiral 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. 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 4. Economics a continuous upward or downward movement in economic activity or prices, caused by interaction between prices, wages, demand, and production spiral [′spī·rəl] (mathematics) A simple curve in the plane which continuously winds about itself either into some point or out from some point. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The move paid off, as GM turned a spiraling downward sales trend into a 200 percent overall sales boost for the Hummer brand. Later in the Renaissance the cycle was more like the modern pattern, with plagues spiraling downward in their frequency and mortality. With their leader gone and things spiraling downward, most teams would've folded. |
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