Congenital failure of the cerebrum to develop normally; usually the cerebellum and basal ganglia are represented at least in rudimentary form. SYN: partial anencephaly. [hemi- + G. kephale, head]
* * *
hemi·ce·pha·lia (hem″e-sə-faґle-ə) [hemi- + cephal- + -ia] congenital absence of the cerebrum.Medical dictionary. 2011.