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spiral

[spahy-ruhl] Example Sentences Origin

spi·ral

[spahy-ruhl] noun, adjective, verb, -raled, -ral·ing or (especially British) -ralled, -ral·ling.
noun
1.
Geometry. a plane curve generated by a point moving around a fixed point while constantly receding from or approaching it.
2.
a helix.
3.
a single circle or ring of a spiral or helical curve or object.
4.
a spiral or helical object, formation, or form.
5.
Aeronautics. a maneuver in which an airplane descends in a helix of small pitch and large radius, with the angle of attack within that of the normal flight range.
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6.
Football. a type of kick or pass in which the ball turns on its longer axis as it flies through the air.
7.
Economics. a continuous increase in costs, wages, prices, etc. (inflationary spiral), or a decrease in costs, wages, prices, etc. (deflationary spiral).
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adjective
8.
running continuously around a fixed point or center while constantly receding from or approaching it; coiling in a single plane: a spiral curve.
9.
coiling around a fixed line or axis in a constantly changing series of planes; helical.
10.
of or of the nature of a spire or coil.
11.
bound with a spiral binding; spiral-bound: a spiral notebook.

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Spiral is one of our favorite verbs.
So is bowdlerise. Does it mean:
to expurgate (a written work) by removing or modifying passages considered vulgar or objectionable.
chat, to converse
verb (used without object)
12.
to take a spiral form or course.
13.
to advance or increase steadily; rise: Costs have been spiraling all year.
14.
Aeronautics. to fly an airplane through a spiral course.
verb (used with object)
15.
to cause to take a spiral form or course.

Origin:
1545–55; < Medieval Latin spīrālis, equivalent to Latin spīr(a) coil (< Greek speîra anything coiled, wreathed, or twisted; see spire2) + -ālis -al1

spi·ral·i·ty [spahy-ral-i-tee] , noun
spi·ral·ly, adverb
mul·ti·spi·ral, adjective
non·spi·ral, adjective, noun
sub·spi·ral, adjective
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sub·spi·ral·ly, adverb
un·spi·ral, adjective
un·spi·ral·ly, adverb
un·spi·raled, adjective
un·spi·ralled, adjective
COLLAPSE
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source Link To spiral
Example Sentences
  • The thoroughbred racing industry is in a downward spiral.
  • So the librarian explained that spiral bond books don't hold up, but fall apart readily.
  • Fisher showed how such a spiral could turn mere busts into depressions.
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Collins
World English Dictionary
spiral (ˈspaɪərəl)
 
n
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
 
adj
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 spire²]
 
'spirally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

spiral
1551, from M.Fr. spiral, from M.L. spiralis "winding, coiling" (1255), from L. spira "coil," from Gk. speira "coil, twist, wreath," from PIE *sper- "to turn, twist." The verb is attested from 1834; the fig. sense is from 1922. The noun is first recorded 1656; U.S. football sense is from 1896. Spiral
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galaxy first attested 1913.
COLLAPSE
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

spiral spi·ral (spī'rəl)
adj.
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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

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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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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