cranioschisis

[krā′nē-ŏs′kĭ-sĭs]

n.

Congenital failure of the skull to close, usually accompanied by defective development of the brain.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.