the white, fatty substance forming a sheath about certain nerve fibers
Origin of myelinGerman from Classical Greek myelos, marrow: see myelo- and -ine
A white fatty material, composed chiefly of lipids and lipoproteins, that encloses certain axons and nerve fibers. Also called medulla .
From Ancient Greek Î¼Ï…ÎµÎ»ÏŒÏ‚ (myelos, “marrow") + -in