"lateral curvature of the spine," 1706, medical Latin, from Latinized form of Greek skoliosis "crookedness," from skolios "bent, curved," from PIE root *skel- "bend, curve," with derivatives referring to crooked parts of the body (as in Greek skelos "leg, limb; Latin scelus "malice, badness, crime;" Old High German scelah, Old English sceolh "oblique, curved, squinting;" Albanian çalë "lame"). Distinguished from lordosis and kyphosis. Related: Scoliotic.
<a href="https://www.etymonline.com/word/triskelion">Etymology of triskelion by etymonline</a>
Harper, D. (n.d.). Etymology of triskelion. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/triskelion