Liberal Dictionary English Dictionary
noun Zoology.
- a tendency in the development of animals to localization of important organs or parts in or near the head.
noun
- (in the evolution of animals) development of a head by the concentration of feeding and sensory organs and nervous tissue at the anterior end
1864, coined by U.S. zoologist James D. Dana (1813-1895) from Greek kephale “head” (see cephalo-) on model of specialization, etc.