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Douglas Harper's Etymology Dictionary
lex talionis

1590s, Latin, "law of retaliation," from talionis, genitive of talio (see retaliation); an eye for an eye, a tooth for a tooth.

Wiktionary
lex talionis

n. law of equivalent retaliation.

Wikipedia
Lex talionis (disambiguation)

Lex talionis is a principle of retaliation, also sometimes referred to as an eye for an eye.

Lex talionis may also refer to:

  • Lex Talionis, an album by English neofolk band Sol Invictus
  • Lex Talionis, an album by American death metal band Acheron