‖ perineurium Anat.
(pɛrɪˈnjʊərɪəm)
[mod.L., f. Gr. περί around + νεῦρον nerve: cf. pericarpium, etc.]
The sheath of connective tissue enveloping a bundle of nerve-fibres. Hence periˈneurial a., of or pertaining to the perineurium.
| 1842 Dunglison Med. Lex., Perineurion, Neurilemma. 1893 A. S. Eccles Sciatica 13 In the lymphatics of the epineurium and the lymph-spaces of the perineurium. 1899 Allbutt's Syst. Med. VI. 637 The thickened perineurium and interstitial tissue. |