anencephalic       
adjective  medical specialized uk/ˌæn.en.kəˈfæl.ɪk/ us/ˌæn.en.səˈfæl.ɪk/
 无脑畸形的
born with part of the brain missing
  an anencephalic foetus 无脑畸形的胎儿 
 The infant was born anencephalic and survived for only three days.  这个婴儿出生时患有无脑畸形,只活了三天。 
 See: anencephaly
 - More examples
 - Extraordinary measures might keep alive an anencephalic baby.
 - The anencephalic twin was stillborn.
 - Ultrasound can identify neural tube defects in anencephalic foetuses.