Rachischisis

1 definition found

From WordNet (r) 2.0 [wn]:

  rachischisis
       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: {spina bifida}, {schistorrhachis}]