Node-of-ranvier definitions

rän'vyā, rän-vyā', räɴ-
A constriction in the myelin sheath, occurring at varying intervals along the length of a nerve fiber.
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Any of the constrictions along the myelin sheath that surrounds an axon of a nerve cell: nodes are formed where two Schwann cells meet and are essential to the proper transmission of nerve impulses.
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A constriction in the myelin sheath, occurring at varying intervals along the length of a nerve fiber.
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(anatomy) A small constriction in the myelin sheath of axons.
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Origin of node-of-ranvier

After Louis Antoine Ranvier (1835–1922), French histologist