Cephalization

1. n. Domination of the head in animal life as expressed in the physical structure; localization of important organs or parts in or near the head, in animal development.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.