Definitions

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

  • n. Brownish-gray nerve tissue, especially of the brain and spinal cord, composed of nerve cell bodies and their dendrites and some supportive tissue.
  • n. Informal Brains; intellect.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative spelling of grey matter.

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

  • n. greyish nervous tissue containing cell bodies as well as fibers; forms the cerebral cortex consisting of unmyelinated neurons

Etymologies

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