Before revision: The terminology of a "seven seas" with varying definitions was part of the vernacular of several peoples (as in the prior mentioned seas of Arabic literature), long before the oceans of the world became known (to those peoples).
After revision: The terminology of a "seven seas" with varying definitions was part of the vernacular of several people (as in the prior mentioned seas of Arabic literature), long before the oceans of the world became known (to those peoples).