perineurium

noun

peri·​neu·​ri·​um ˌper-ə-ˈnu̇r-ē-əm 

-ˈnyu̇r-

plural perineuria ˌper-ə-ˈnu̇r-ē-ə 

-ˈnyu̇r-

: the connective-tissue sheath that surrounds a bundle of nerve fibers

Word History

Etymology

New Latin, from peri- + Greek neuron nerve — more at nerve

First Known Use

1867, in the meaning defined above

Medical Definition

perineurium

noun

peri·​neu·​ri·​um ˌper-ə-ˈn(y)u̇r-ē-əm 

plural perineuria -ē-ə 

: the sheath of connective tissue that surrounds a bundle of nerve fibers