MEDULLARY SHEATH

Pronunciation (US):

(GB):

 Dictionary entry overview: What does medullary sheath mean? 

• MEDULLARY SHEATH (noun)
  The noun MEDULLARY SHEATH has 1 sense:

1. a layer of myelin encasing (and insulating) the axons of medullated nerve fibers

  Familiarity information: MEDULLARY SHEATH used as a noun is very rare.

 Dictionary entry details 

• MEDULLARY SHEATH (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting body parts

Synonyms:

medullary sheath; myelin sheath

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)