Foetal malformation characterised by a bony deficiency, i.e., absence of the occipital bone of the cranium. ... Origin: G. Notos, back, + an-priv. + kephale, head ... (05 Mar 2000) ... 
Type: Term Pronunciation: nō′tan-se-fā′lē-ă Definitions: 1. Fetal malformation characterized by absence of the occipital bone of the cranium.