(n) a not uncommon congenital defect in which a vertebra is malformed; unless several vertebrae are affected or there is myelomeningocele there are few symptoms; can be diagnosed by amniocentesis, Syn.rachischisis, schistorrhachis
a. [ L. bifidus; bis twice + root of findere to cleave or split: cf. F. bifide. ] Cleft to the middle or slightly beyond the middle; opening with a cleft; divided by a linear sinus, with straight margins. [ 1913 Webster ]
‖ (Med.) [ L., cleft spine. ] A congenital malformation in which the spinal column is cleft at its lower portion, and the membranes of the spinal cord project as an elastic swelling from the gap thus formed. [ 1913 Webster ]
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