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myelin 音標拼音: [m'ɑɪɪlɪn] 髓磷脂 髓磷脂 myelin n 1: a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers [synonym: {myelin}, {myeline}, {medulla}] myelin \my"e*lin\, myeline \my"e*line\, n. [Gr. myelo`s marrow.]
(Physiol. Chem.) (a) A soft white substance constituting the medullary sheaths of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, protein, and some fat. (b) One of a group of phosphorized principles occurring in nerve tissue, both in the brain and nerve fibers. [1913 Webster]
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