adj. Of or pertaining to the nerves; seated in the nerves; nervous.adj. Useful in disorders of, or affecting, the nerves.adj. Of or pertaining to neurosis{2}; characteristic of neurosis{2}; caused by neurosis{2}.n. A disease seated in the nerves.n. Any toxic agent whose action is mainly directed to the great nerve centers.n. A person afflicted with a neurosis{2}.