torsion
noun /ˈtɔːʃn/
/ˈtɔːrʃn/
[uncountable] (specialist)- the action of twisting something, especially one end of something while the other end is held fixed
（物体等一端固定的）扭转 词源late Middle English (as a medical term denoting colic or in the sense ‘twisting’ (especially of a loop of the intestine)): via Old French from late Latin torsio(n-), variant of tortio(n-) ‘twisting, torture’, from Latin torquere ‘to twist’.