scoliosisPronunciation: /ˌskɒlɪˈəʊsɪs, ˌskəʊ-/Definition of scoliosis noun [mass noun] Medicine abnormal lateral curvature of the spine. Derivatives scolioticPronunciation: /-ˈɒtɪk/ adjective Origin: early 18th century: modern Latin, from Greek, from skolios 'bent'scoliosis in other Oxford dictionaries Definition of scoliosis in the US English dictionary