rachischisis

noun
ra·​chis·​chi·​sis | \ rə-ˈkis-kə-səs How to pronounce rachischisis (audio) \
plural rachischises\ -​kə-​ˌsēz How to pronounce rachischises (audio) \

Medical Definition of rachischisis

: a congenital abnormality (as spina bifida) characterized by a cleft of the spinal column

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