noun
(also myelomeningocoele)
Medicine Spina bifida in which the tissue of the spinal cord and its surrounding membranes (the meninges) protrudes through the cleft in the spine, forming a rounded swelling of the skin usually slightly above the base of the spine; the tissue so protruding.
Origin
Late 19th century; earliest use found in Albert Buck (1842–1922). From myelo- + meningocele.
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