White matter

White matter is one of the three main solid components of the central nervous system designated by color. The other two are gray matter and substantia nigra.
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White matter n. Whitish nerve tissue, especially of the brain and spinal cord, chiefly composed of myelinated nerve fibers and containing few or no [more]White matter - Community and Resources

Noun
1. whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths
(synonym) substantia alba
(hypernym) nervous tissue, nerve tissue
(hyponym) nerve pathway, tract, nerve tract, pathway
(substance-holonym) central nervous system, CNS, systema nervosum centrale
(part-meronym) fibrous astrocyte

The part of the brain that contains myelinated nerve fibers. The white matter is white because it is the color of myelin, the insulation covering the nerve fibers. The white matter is as opposed to the gray matter (the cortex of the brain which contains nerve cell bodies).

Eng: white matter
Urdu: (تَشریحُ الاعضا) عصبی بافت ۔ حَرام مَغَز اور دِماغ کی ۔