Biography Wikipedia
Wikipedia:
The word torsion may refer to the following:
In geometry: Torsion of a curveTorsion tensor in differential geometryThe closely related concepts of Reidemeister torsion (also called R-torsion, Franz torsion, de Rham torsion) and analytic torsion (also called Ray-Singer torsion)Whitehead torsionIn algebra: Torsion (algebra)Tor functorIn medicine: Ovarian torsionTesticular torsionSpiral fracture, a.k.a. Torsion fractureBloat particularly in cattle and dogsHorse colic#TorsionIn physics and engineering: Torsion (mechanics)Torsion coefficientTorsion pendulumTorsion spring or -barTorsion field (pseudoscience), a theory by Russian scientistsIn biology: Torsion (gastropod), a developmental feature of all gastropodsIn warfare: Torsion siege engine, a kind of catapult