1Anatomy and Zoology a large nerve arising from the brachial plexus and supplying branches to the skin and muscles of the posterior arm, forearm, and hand or manus.
2Zoology any of a group of nerves arranged in a radial pattern, specifically a nerve supplying a single ray of an echinoderm.
Origin
Mid 18th century.
Definition of radial nerve in US English:
radial nerve
noun
1Anatomy and Zoology a large nerve arising from the brachial plexus and supplying branches to the skin and muscles of the posterior arm, forearm, and hand or manus.
2Zoology any of a group of nerves arranged in a radial pattern, specifically a nerve supplying a single ray of an echinoderm.