Oceanus Deucaledonius

From ōceanus (“ocean”) +‎ Deucaledonius (“of Deucaledon”), with the adjective being a misspelling of Deucalionius / Deucalioneus (“of Deucalion”), in confusion with the nearby Calēdonia (“Scotland”). Deucalion was a son of Prometheus in Greek mythology who survived a flood sent by Zeus. Possibly preceded by a term such as "Oceanus Deucalionius."

• (Classical Latin) IPA^(key): [oːˈke.a.nʊs dɛu̯.ka.ɫɛˈdɔ.ni.ʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [oˈt͡ʃɛː.a.nus d̪eu̯.ka.leˈd̪ɔː.ni.us]

Ōceanus Deucaledonius m sg (genitive Ōceanī Deucaledoniī); second declension

1. The Deucaledon Ocean (a historical ocean which comprises roughly the northernmost parts of the Atlantic Ocean)

Second-declension noun with a second-declension adjective, singular only.

• Middle English: → Deucaledon Ocean (calque)

• Guilielmo Blaeuw (1622) Europa recens descripta [A recent description of Europe] (in Latin).