A monstrosity in which only a small portion of the brain exists, resting on the cervical vertebrae -more properly derencephalia. -G. St. Hilaire. According to Is. G. St. Hilaire, a monstrosity characterized by the total absence of encephalon, and of the medulla spinalis into the cervical region.
A monstrosity characterized by absence of a greater or less part of the brain and neck. [Gr.]