from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A form or part that is folded or coiled.
  • n. One of the convex folds of the surface of the brain.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Something that is folded or twisted.
  • n. Any of the folds on the surface of the brain.
  • n. The shape of something rotating; a vortex.
  • n. A form of moving average.
  • n. A function which maps a tuple of sequences into a sequence of tuples.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of rolling anything upon itself, or one thing upon another; a winding motion.
  • n. The state of being rolled upon itself, or rolled or doubled together; a tortuous or sinuous winding or fold, as of something rolled or folded upon itself.
  • n. An irregular, tortuous folding of an organ or part.

from The Century Dictionary and Cyclopedia

  • n. The act of rolling. or winding together, or of winding one part or thing on another; the motion or process of winding in and out.
  • n. The state of being rolled upon itself, or rolled or wound together.
  • n. A turn or winding; a fold; a gyration; an anfractuosity; a whorl: as, the convolutions of a vine; the convolutions of the intestines.
  • n. In anatomy, specifically, one of the gyri, gyres, or anfractuosities of the brain, especially of the cerebrum. See cuts under brain and corpus.
  • n. In mathematics, such a connection between the relations of any asyzygetic system that each is applied alternately in the aggregate of the remaining relations.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a convex fold or elevation in the surface of the brain
  • n. the action of coiling or twisting or winding together
  • n. the shape of something rotating rapidly


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin convolutus ("to roll together"), past participle of convolvere, from con- + volvere ("to roll").


  • These types of operations are commonly referred to as convolution or spatial convolution.


  • It was in 1861 that he announced his discovery of the seat of articulate speech in the left side of the frontal region of the brain, since known as the convolution of Broca.

    Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"

  • It is of small size, and consists of a square-shaped convolution, which is termed the precuneus or quadrate lobe.

    IX. Neurology. 4c. The Fore-brain or Prosencephalon

  • In front of this precentral convolution are the three frontal convolutions, and it would seem that the functions of these convolutions are higher movements and attention in fixation of the eyes; moreover, in the lowest frontal region, indicated by fine dots, we have Broca's convolution, which is associated with motor speech; above at the base of the second middle frontal convolution is the portion of cortex in which is localised the function of writing.

    The Brain and the Voice in Speech and Song

  • M. Alain's expensive way of life, his clothes and mistresses, his dicing and racehorses, were all explained: he was in the pay of Buonaparte, a hired spy, and a man that held the strings of what I can only call a convolution of extremely fishy enterprises.

    St. Ives, Being the Adventures of a French Prisoner in England

  • The interior portion of the convolution is the more intellectual portion of the organ, while the exterior portion is that which holds the closest relation to the fibres of the _corpora striata_ in the middle lobe, and may therefore most properly be called the organ of language or of speech, the impairment of which produces aphasia, or loss of speech.

    Buchanan's Journal of Man, February 1887 Volume 1, Number 1

  • Convolution Kernels - Many of the most powerful image processing algorithms rely upon a process known as convolution (or spatial convolution), which can be used to perform a wide variety of operations on digital images.


  • In particular, Fourier analytic methods are particularly useful for studying operations such as convolution in frequency space (the domain of the frequency variable

    What's new

  • He looked again and decided that it was the purple haze of the hills made dark by a convolution of the cãnon wall at its back.

    All Gold Cañon

  • At some length and terminological convolution on their part, making these exact same points to them, even that one about the computer program, with little effect … it is the most bizarre thing.

    Unpersuasive Arguments for Free Will


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