hydranencephaly
(hī′drăn-ən-sĕf′ə-lē)- The congenital absence of the cerebral hemispheres in which the space in the cranium that they normally occupy is filled with fluid.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.