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tabes dorsalis tabes dor·sa·lis (dôr-sā'lĭs, -sāl'ĭs)
A late form of syphilis resulting in hardening of the dorsal columns of the spinal cord and characterized by shooting pains, emaciation, loss of muscular coordination, and disturbances of sensation and digestion. Also called Duchenne's disease, locomotor ataxia, spinal atrophy.