'Spina bifida' definitions:

Definition of 'spina bifida'

(from WordNet)
noun
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, rachischisis, schistorrhachis]

Definition of 'Spina bifida'

From: GCIDE
  • Spina bifida \Spi"na bif"i*da\ (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]