Tyrrhenian /tɪˈɹiːniən/adjective 3noun 1forms 1 adjective3 •Etruscan; of Etruria. •Of or relating to the Tyrrhenian Sea.This word [mufrone, 'mouflon'] has no Latin etymology and, especially since it specifically refers to animals endemic to the Tyrrhenian islands, it is suspect of being of pre-Roman origin. — 2025 •Of the languages of the Tyrrhenian family: Etruscan, Raetic or Lemnian. noun1 •An Etruscan. formsTyrrhenians