Meaning of TORSION in English
( n. )
The act of turning or twisting, or the state of being twisted; the twisting or wrenching of a body by the exertion of a lateral force tending to turn one end or part of it about a longitudinal axis, while the other is held fast or turned in the opposite direction.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012