lex talionis
noun
[ lɛks ˌtalɪˈəʊnɪs ]
• the law of retaliation, whereby a punishment resembles the offence committed in kind and degree.
• "the lex talionis of feud violence and blood money"
Origin:
Latin, from lex ‘law’ and talio(n- ) ‘retaliation’ (from talis ‘such’).
