axolemma

English Thesaurus

1. outer membrane covering an axon (noun.body)

hypernym	:	membrane, tissue layer,
definition	:	a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants (noun.body)

part meronym	:	medullary sheath, myelin sheath,
definition	:	a layer of myelin encasing (and insulating) the axons of medullated nerve fibers (noun.body)