'Atlantica' originates from Latin, specifically from the adjective 'Atlanticus', which in turn comes from Greek 'Atlantikos' — 'Atlant-' referring to the mythic Atlas and '-ikos' / '-icus' meaning 'pertaining to'.

'Atlantica' developed as a feminine/nominal form from Latin 'Atlanticus' (and Greek 'Atlantikos') and was adopted in Modern usage as a proper name for places, taxa, products, and fictional realms.

Initially it meant 'pertaining to Atlas or the Atlantic (sea)'; over time the form 'Atlantica' has been used as a proper name for geological hypotheses, biological genera, entertainment titles, and fictional locations.