Definitions for: Myelin


[n] a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers



Webster (1913) Definition: My"e*lin, n. [Gr. ? marrow.] (Physiol. Chem.)
(a) A soft white substance constituting the medullary sheats
of nerve fibers, and composed mainly of cholesterin,
lecithin, cerebrin, albumin, and some fat.
(b) One of a group of phosphorized principles occurring in
nerve tissue, both in the brain and nerve fibers.

Synonyms: medulla, myeline

See Also: fat, medullary sheath, myelin sheath

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