The term notancephalia is a rare medical condition where the brain fails to develop properly. The spelling of this word can be a bit tricky to understand at first. The first syllable "no" is pronounced /nəʊ/, which is followed by "tan" pronounced as /tæn/, then "sef" /sɛf/ and finally "alia" /eɪljə/. The word is derived from the Greek words "notos" meaning "back" and "enkephalos" meaning "brain". While it may be difficult to spell and pronounce, understanding notancephalia is important for those in the medical field.
A monstrosity marked by a deficiency in the occipital region of the skull.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.