iniencephalus

Word of the Day: Iniencephalus

A congenitally deformed fetus in which the brain substance protrudes through a fissure in the occiput, so that the brain and spinal cord occupy a single cavity.

Image from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1591245/
Definition from: Taber’s Cyclopedic Medical Dictionary