Medical Dictionary

white matter

noun

Medical Definition of WHITE MATTER

:  neural tissue especially of the brain and spinal cord that consists largely of myelinated nerve fibers bundled into tracts, has a whitish color, and typically underlies the gray matter

Browse

May 25, 2015
callithump Hear it
a noisy boisterous band or parade
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears