Myelin
Pronunciation : My"e*lin
Part of Speech : n.
Etymology : [Gr. (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, bot
Source : Webster's Unabridged Dictionary, 1913