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“myelin”
myelin, myeline
A white fatty material, composed chiefly of lipids and lipoproteins, that encloses certain axons and nerve fibers.
(Greek: lipoid substance (containing or resembling fat) sheathing certain nerve fibers; lipoid substance found in body tissue)
(Greek: bone marrow; the spinal cord and medulla oblongata; the myelin sheath of nerve fibers)