Library / English Dictionary

    MEDULLARY SHEATH

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    A layer of myelin encasing (and insulating) the axons of medullated nerve fibersplay

    Synonyms:

    medullary sheath; myelin sheath

    Classified under:

    Nouns denoting body parts

    Hypernyms ("medullary sheath" is a kind of...):

    case; sheath (an enveloping structure or covering enclosing an animal or plant organ or part)

    Meronyms (parts of "medullary sheath"):

    axolemma (outer membrane covering an axon)

    nodes of Ranvier; Ranvier's nodes (small gaps in the myelin sheath of medullated axons)

    oligodendria; oligodendroglia (tissue consisting of glial cells with sheetlike processes that form the myelin sheath of nerve fibers)

    Meronyms (substance of "medullary sheath"):

    medulla; myelin; myeline (a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers)

    Holonyms ("medullary sheath" is a part of...):

    medullated nerve fiber; myelinated nerve fiber (a nerve fiber encased in a sheath of myelin)

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