from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A diffuse network of cells that conducts impulses in all directions from the area stimulated, forming a primitive nervous system in ctenophores, coelenterates, and certain other organisms.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Simplistic and uncentralized nervous system of cnidarians.


Sorry, no etymologies found.


Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.