Marmara << MAHR muhr uh >>, Sea of, is part of the trade waterway that links the Black Sea with the Mediterranean Sea. The Sea of Marmara was once called Propontis. The Bosporus, a strait, connects it with the Black Sea on the east. Another strait, the Dardanelles, links it with the Aegean Sea on the west. The Sea of Marmara is about 170 miles (275 kilometers) long and 50 miles (80 kilometers) across at its widest point. It covers about 4,300 square miles (11,100 square kilometers). See also Bosporus; Dardanelles.
