Jisho

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Noun
1. myelin sheath (around the axon of a neuron)
Wikipedia definition
2. MyelinMyelin is a dielectric material that forms a layer, the myelin sheath, usually around only the axon of a neuron. It is essential for the proper functioning of the nervous system. Myelin is an outgrowth of a type of glial cell. The production of the myelin sheath is called myelination. In humans, the production of myelin begins in the fourteenth week of fetal development, although little myelin exists in the brain at the time of birth.
Read “Myelin” on English Wikipedia
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Read “Myelin” on DBpedia

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