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Synset

a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
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medullary sheath more info
myelin sheath more info
semantic pointers
hypernym
sheath, case
part meronym
axolemma Ranvier's nodes, nodes of Ranvier oligodendroglia, oligodendria
part holonym
medullated nerve fiber, myelinated nerve fiber
substance meronym
myelin, myeline, medulla