tor ‧ sion /ˈtɔːʃ ə n $ ˈtɔːr-/ BrE AmE noun [uncountable]
[ Date: 1400-1500 ; Language: Late Latin ; Origin: torsus , past participle of Latin torquere ; ⇨ ↑ torque ]
technical the twisting of a piece of metal
tor ‧ sion /ˈtɔːʃ ə n $ ˈtɔːr-/ BrE AmE noun [uncountable]
[ Date: 1400-1500 ; Language: Late Latin ; Origin: torsus , past participle of Latin torquere ; ⇨ ↑ torque ]
technical the twisting of a piece of metal
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012