Oceanum
Oceanum is a Latin form of Oceanus, meaning “the Ocean (the great sea surrounding the earth)”. It is the accusative singular masculine noun.
Found 126 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 2.34.1: … iserat ad Venetos, Venellos, Osismos, Coriosolitas, Esuvios, Aulercos, Redones, quae sunt maritimae civitates Oceanumque attingunt, certior factus est omnes eas civitates in dicionem potestatemque populi Romani esse redactas.
Ovid, Amores 1.13.1: Iam super oceanum venit a seniore marito
All forms of Oceanus (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.