A type of anencephaly in which the brain and cranium are present in rudimentary form. ... Origin: mero-+ G. An-priv. + enkephalos, brain ... (05 Mar 2000) ... 
Type: Term Pronunciation: mer′ō-an′en-sef′ă-lē Definitions: 1. Congenital absence of the calvaria and most of the brain, usually the forebrain and midbrain. Synonyms: anencephalia, anencephaly