neu·ri·lem·ma 
(nr′ə-lĕmə, nyr′-)
(nr′ə-lĕmə, nyr′-)n.
1. See Schwann cell.
2. The sheath that is formed by a Schwann cell.
[Alteration (influenced by Greek lemma, husk) of French névrilème : névr-, nerve (from Greek neuro-, neuro-) + Greek eilēma, veil (from eilein, to wind, turn; see wel-2 in the Appendix of Indo-European roots).]
neu′ri·lemmal adj.