Word

medullary sheath, n.

a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
<noun.body>

medullary sheath myelin sheath

semantic pointers

hypernym

part meronym

axolemma Ranvier's nodes, nodes of Ranvier oligodendroglia, oligodendria

part holonym

medullated nerve fiber, myelinated nerve fiber

substance meronym

myelin, myeline, medulla