internuncial

inter- +‎ nuncial

internuncial (not comparable)

1. Of or relating to an internuncio.
2. Between neurons; communicating or transmitting impressions between different parts of the body.
   • 1874, William Benjamin Carpenter, Principles of mental physiology:

     there must also be a definite Nervous system , whose action may be purely internuncial , —that of calling forth Muscular movements in respondence to the impressions made by external agencies

• internunciary
• internunciatory