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Torsion may refer to: *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 * * Dihedral angle *In algebra: * * Torsion (algebra) * * Tor functor * * Torsion-free module * In medicine: * * Of bones, "torsion fracture" is another term for spiral fracture. * * Of organs, torsion refers to twisting, in particular twisting that interrupts the blood supply to that organ, e.g. splenic torsion, ovarian torsion, or testicular torsion. * * Torsion of the digestive tract in some domestic animals: * * * A type of horse colic * * * One complication of bloat (gastric torsion) * In physics and engineering: * * Torsion (mechanics) * * Torsion coefficient * * Torsion pendulum * * Torsion spring or -bar * * Torsion field (pseudoscience), a field alleged to make faster-than-light communication and paranormal phenomena possible, a theory by Russian scientists * * The field used in Einstein–Cartan theory and other alternatives to general relativity that involve torsion of spacetime * In biology: * * Torsion (gastropod), a developmental feature of all gastropods * In warfare: * * Torsion siege engine, a kind of catapult 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Torsion」の詳細全文を読む スポンサード リンク
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