'Perineurium' definitions:

Definition of 'perineurium'

(from WordNet)
noun
The sheath of connective tissue that covers a bundle of nerve fibers

Definition of 'Perineurium'

From: GCIDE
  • Perineurium \Per`i*neu"ri*um\, n. [NL., fr. Gr. peri` about + ney^ron a nerve.] (Anat.) The connective tissue sheath which surrounds a bundle of nerve fibers. See Epineurium, and Neurilemma. [1913 Webster]