nodes of Ranvier

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node of Ran·vier

 (rän′vyā, rän-vyā′, räN-)
n. pl. nodes of Ranvier
A constriction in the myelin sheath, occurring at varying intervals along the length of a nerve fiber.

[After Louis Antoine Ranvier (1835-1922), French histologist.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nodes of Ranvier - small gaps in the myelin sheath of medullated axons
medullary sheath, myelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
opening, gap - an open or empty space in or between things; "there was a small opening between the trees"; "the explosion made a gap in the wall"