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⇱ white matter - WordReference.com Dictionary of English


WordReference Random House Learner's Dictionary of American English © 2026
ˈwhite ˌmat•ter,  n. [uncountable]
  1. Anatomynerve tissue, esp. of the brain and spinal cord, that is nearly white in color.

WordReference Random House Unabridged Dictionary of American English © 2026
white′ mat′ter, [Anat.]
  1. Anatomynerve tissue, esp. of the brain and spinal cord, which primarily contains myelinated fibers and is nearly white in color. Cf. gray matter (def. 1).
  • 1830–40

Collins Concise English Dictionary © HarperCollins Publishers::
white matter n
  1. the whitish tissue of the brain and spinal cord, consisting mainly of myelinated nerve fibresTechnical name: substantia alba
    Compare grey matter
'white matter' also found in these entries (note: many are not synonyms or translations):
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