spi·na bi·fi·da /ˌspaɪnəˈbɪfədə/
 spina bi·fi·da /-ˈbɪfədə , ˈbaɪf-/ 名詞
 脊柱裂
 Spi·na bif·i·da Med.  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.
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 spina bifida
      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]