ichthys (plural ichthyses)
From Ancient Greek ΙΧΘΥΣ (IKhThUS, “fish”), which served as an acronym for Ἰησοῦς (Iēsoûs, “Jesus”) Χριστός (Khristós, “Christ”) Θεοῦ (Theoû, “of God”) Υἱός (Uhiós, “son”) Σωτήρ (Sōtḗr, “saviour”).