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[kon-vuh-loo-shuh n] /ˌkɒn vəˈlu ʃən/
a rolled up or coiled condition.
a rolling or coiling together.
a turn of anything coiled; whorl.
Anatomy. one of the sinuous folds or ridges of the surface of the brain.
Origin of convolution
1535-45; < Latin convolūt- (see convolute) + -ion
Related forms
convolutional, convolutionary
[kon-vuh-loo-shuh-ner-ee] /ˌkɒn vəˈlu ʃəˌnɛr i/ (Show IPA),
3. twist, winding, sinuosity. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for convolutions
  • The grooves and folds in the cerebral cortex are called convolutions.
  • But it makes little narrative sense, tripping up on its own convolutions and fatally lacking in tension.
  • New studies are revealing how the brain's convolutions take shape.
  • The large intestine, in its course, describes an arch which surrounds the convolutions of the small intestine.
  • The story, as would be natural, has its devious convolutions of plot.
  • By the start of the new millennium, scientists could explain the complex convolutions of embryos in stunning molecular detail.
  • Without its convolutions, the cortex would take up three times the area it does in its wrinkled state.
  • Supports from one to three dimensional convolutions.
  • Provide conduit with a continuous copper bonding conductor wound spirally between the convolutions.
British Dictionary definitions for convolutions


a twisting together; a turn, twist, or coil
an intricate, involved, or confused matter or condition
Also called gyrus. any of the numerous convex folds or ridges of the surface of the brain
Derived Forms
convolutional, convolutionary, adjective
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
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Word Origin and History for convolutions



1540s, from Latin convolutus, past participle of convolvere "to roll together," from com- "together" (see com-) + volvere "to roll" (see volvox).

Online Etymology Dictionary, © 2010 Douglas Harper
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convolutions in Medicine

convolution con·vo·lu·tion (kŏn'və-lōō'shən)

  1. A form or part that is folded or coiled.

  2. One of the convex folds of the surface of the brain.

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