Adjacent Words

myelin definitions

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WordNet (r) 3.0 (2005)

n
1: a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers [syn: myelin, myeline, medulla]

Merriam Webster's

noun Etymology: International Scientific Vocabulary Date: 1873 a soft white somewhat fatty material that forms a thick myelin sheath about the protoplasmic core of a myelinated nerve fiber • myelinic adjective

Oxford Reference Dictionary

n. a white substance which forms a sheath around certain nerve-fibres. Derivatives: myelination n. Etymology: Gk muelos marrow + -IN

Webster's 1913 Dictionary

Myelin 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.