Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun medullary_sheath

1 sense of medullary sheath

Sense 1
medullary sheath, myelin sheath -- (a layer of myelin encasing (and insulating) the axons of medullated nerve fibers)
       => sheath, case -- (an enveloping structure or covering enclosing an animal or plant organ or part)