congenital defect

n a congenital defect in which the top of the head is depressed (concave instead of convex)

n a congenital defect in which one or more toes or fingers are abnormally positioned

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

n congenital defect of having one or more extra chromosomes in somatic cells

n a not uncommon congenital defect in which a vertebra is malformed