Medical Dictionary

spondylolisthesis

noun spon·dy·lo·lis·the·sis \ˌspän-də-lō-lis-ˈthē-səs\

Medical Definition of SPONDYLOLISTHESIS

:  forward displacement of a lumbar vertebra on the one below it and especially of the fifth lumbar vertebra on the sacrum producing pain by compression of nerve roots

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