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spiral |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Idioms, Wikipedia, Hutchinson | 0.02 sec. |
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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 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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He joined to these a spiral, two inches in diameter, which terminated in two branch pieces of unequal length, the longer of which, however, was twenty-five feet in height and the shorter only fifteen feet. Here we discovered a spiral stairway leading up from the center of the circular room. He had the letter taken from his pocket and the table- on which stood a glass of lemonade and a spiral wax candle- moved close to the bed, and putting on his spectacles he began reading. |
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