Atlanticus
Could not find Atlanticum in Logeion dictionaries.
Atlanticum Proper-name adjective: neuter vocative singular, Proper-name adjective: masculine genitive plural, Proper-name adjective: masculine accusative singular, Proper-name adjective: neuter genitive plural, Proper-name adjective: neuter nominative singular, Proper-name adjective: neuter accusative singular of Atlanticus
Atlantĭcus, (16) v. Atlantiacus.