Eostach

== Irish == === Etymology === From Italian Eustachi, adapted to the suffix -ach. === Adjective === Eostach (genitive singular masculine Eostaigh, genitive singular feminine Eostaí, plural Eostacha, comparative Eostaí) Eustachian ==== Declension ==== ==== Derived terms ==== feadán Eostach (“Eustachian tube”) === Mutation === === Further reading === Ó Dónaill, Niall (1977), “Eostach”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN de Bhaldraithe, Tomás (1959), “Eostach”, in English-Irish Dictionary, An Gúm