n a congenital defect in which the top of the head is depressed (concave instead of convex)
2
n a congenital defect in which one or more toes or fingers are abnormally positioned
3
n a congenital defect of the central nervous system in which a sac containing part of the spinal cord and its meninges protrude through a gap in the vertebral column
4
n congenital defect of having one or more extra chromosomes in somatic cells
5
n a not uncommon congenital defect in which a vertebra is malformed
