1. A disturbed function of the nerves or nervous system as a result of a blood ailment which may be painful and may cause the shrinking or atrophy of specific muscles: Hanson spent many hours lying quietly in bed because of the septineuritis which affected his lower legs.
2. A generalized, diffuse neuritis of the entire nervous system due to the multiplication and migration of viruses in nervous tissue; for example, that which may occur with rabies: Realizing the dog had bitten her, Martha rushed to the hospital emergency to get a tetanus shot because she was fearful of being infected with septineuritis.