Origin of spiral

1545–55; < Medieval Latin spīrālis, equivalent to Latin spīr(a) coil (< Greek speîra anything coiled, wreathed, or twisted; see spire2) + -ālis -al1
Related formsspi·ral·i·ty [spahy-ral-i-tee] /spaɪˈræl ɪ ti/, nounspi·ral·ly, adverbmul·ti·spi·ral, adjectivenon·spi·ral, adjective, nounsub·spi·ral, adjectivesub·spi·ral·ly, adverbun·spi·ral, adjectiveun·spi·ral·ly, adverbun·spi·raled, adjectiveun·spi·ralled, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for spiral

Contemporary Examples of spiral

Historical Examples of spiral

British Dictionary definitions for spiral



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 = a θ; of logarithmic spiral: log r = a θ; of hyperbolic spiral: r θ = a, (where a is a constant)
another name for helix (def. 1)
something that pursues a winding, usually upward, course or that displays a twisting form or shape
a flight manoeuvre in which an aircraft descends describing a helix of comparatively large radius with the angle of attack within the normal flight rangeCompare spin (def. 16)
economics a continuous upward or downward movement in economic activity or prices, caused by interaction between prices, wages, demand, and production


having the shape of a spiral

verb -rals, -ralling or -ralled or US -rals, -raling or -raled

to assume or cause to assume a spiral course or shape
(intr) to increase or decrease with steady accelerationwages and prices continue to spiral
Derived Formsspirally, adverb

Word Origin for spiral

C16: via French from Medieval Latin spīrālis, from Latin spīra a coil; see spire ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for spiral

1550s, from Middle French spiral, from Medieval Latin spiralis "winding, coiling" (mid-13c.), from Latin spira "coil," from Greek speira "coil, twist, wreath," from PIE *sper- "to turn, twist." Spiral galaxy first attested 1913.


1726 (implied in spiraled), from spiral (n.). Transferred and figurative sense by 1922. Related: Spiraling.


1650s, from spiral (adj.). U.S. football sense is from 1896.

Online Etymology Dictionary, © 2010 Douglas Harper

spiral in Medicine




Coiling or developing around an axis in a constantly changing series of planes; helical.


A structure in the shape of a coil.


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.