Torsion

The word torsion may refer to the following:

  • In geometry:
    • Torsion of a curve
    • Torsion tensor in differential geometry
    • The closely related concepts of Reidemeister torsion (also called R-torsion, Franz torsion, de Rham torsion) and analytic torsion (also called Ray-Singer torsion)
    • Whitehead torsion
  • In algebra:
    • Torsion (algebra)
    • Tor functor
  • In medicine:
    • Ovarian torsion
    • Testicular torsion
    • Any Organ torsion refers to twisting that interrupts the blood supply to that organ ie., splenic torsion
    • Spiral fracture, a.k.a. Torsion fracture
    • Bloat particularly in cattle and dogs
    • Horse colic#Torsion
  • In physics and engineering:
    • Torsion (mechanics)
    • Torsion coefficient
    • Torsion pendulum
    • Torsion spring or -bar
    • Torsion field (pseudoscience), a theory by Russian scientists
  • In biology:
    • Torsion (gastropod), a developmental feature of all gastropods
  • In warfare:
    • Torsion siege engine, a kind of catapult