A medical condition where the spine curves abnormally sideways, making the back look uneven or bent.
From Greek 'skoliosis' meaning 'crookedness,' from 'skolios' (curved/bent). The medical term was adopted directly from Greek by doctors in the 1700s.
Your spine is supposed to have gentle curves, but scoliosis creates an extreme S or C shape—surprisingly, many people live their whole lives not realizing they have it!
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