αἴθριον Save αἴθριον, atrium (coined after the Latin) Could not find αἰθρίῳ in Logeion dictionaries. αἰθρίῳ Noun: neuter dative singular of αἴθριον αἰθρίῳ Adjective: masculine dative singular, Adjective: feminine dative singular, Adjective: neuter dative singular of αἴθριος See αἰθρίῳ in Morpho Grieks Nederlands αἴθριον -ου, τό zie αἴθριος.