a malformed fetus in which the head consists primarily of the jaws.
A fetal malformation with little of the head formed except the jaws.
[gnatho- + G. kephalē, head]
gnathocephalus(năth″ō-sĕf′ă-lŭs) [″ + kephale, head]
A malformed fetus in which the head consists principally of the jaws.