Douglas Harper's Etymology Dictionary
trans-Atlantic
also transatlantic, 1779, from trans- "through, across" + Atlantic.
Wiktionary
trans-atlantic
a. (alternative spelling of transatlantic English)
Usage examples of "trans-atlantic".
Queenstown is the Irish port at which the trans-Atlantic steamers stop to put off the mails.
East Harbor Grouping, as has been remarked, was a shipping center, and certainly a trans-Atlantic vessel was not beyond the capacity of a Grouping that traded along the full lengths of both coasts of the Americas.