baptismum Save Could not find baptismo in Logeion dictionaries. baptismo neuter dative singular, neuter ablative singular of baptismum baptismo masculine ablative singular, masculine dative singular of baptismus See baptismo in Morpho Gaffiot 2016 baptismum, n. ( -mus, m. ), ī (βαπτισμός), baptême : Tert. Bapt. 15 ; Eccl.