Connective tissue that covers a bundle of nerve fibers

WordNet Word definitions in WordNet
n. connective tissue that covers a bundle of nerve fibers

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Perineurium \Per`i*neu"ri*um\, n. [NL., fr. Gr. ? about + ? a nerve.] (Anat.) The connective tissue sheath which surrounds a bundle of nerve fibers. See Epineurium , and Neurilemma .

Wikipedia Word definitions in Wikipedia
In the peripheral nervous system , the myelin sheath of each axon in a nerve is wrapped in a delicate protective sheath known as the endoneurium . Within the nerve, axons targeting the same anatomical location bundled together into groups known as fascicles ...

Wiktionary Word definitions in Wiktionary
n. (context anatomy English) The sheath of connective tissue that surrounds a fascicle of nerve fibres