retaliatory action taken by a state whose citizens have been mistreated by a foreign power by treating the subjects of that power similarly; reprisal
Word origin
C17: from French; see retort1
retorsion in American English
(rɪˈtɔrʃən)
noun
Law
a retaliation; reprisal; esp., in international law, mistreatment by one country of the citizens or subjects of another in retaliationfor similar mistreatment received