anencephalous

from WordNet (r) 3.0 (2006)

anencephalous
    adj 1: characterized by partial or total absence of a brain
           [syn: {anencephalic}, {anencephalous}]

from The Collaborative International Dictionary of English v.0.48

Anencephalic \An*en`ce*phal"ic\, Anencephalous
\An`en*ceph"a*lous\, a. [Gr. ?, priv. + ? the brain: cf.
   {Encephalon}.] (Zool.)
   Without a brain; brainless. --Todd & B.
   [1913 Webster] Anenst