node of Ranvier
Concise Oxford English Dictionary © 2008 Oxford University Press:
node of Ranvier /ˈrɑːnvɪəɪ/
▶noun Anatomy a gap in the myelin sheath of a nerve, between adjacent Schwann cells.
– origin C19: named after the French histologist Louis Antoine Ranvier.
'node of Ranvier' also found in these Oxford entries:

