Bartolomeu Dias (bär´tŏŏlŏŏmā´ŏŏ dē´əsh), d. 1500, Portuguese navigator. He was the first European to round (1488) the Cape of Good Hope, which he called Cabo Tormentoso [cape of storms]. That voyage opened the road to India. Dias accompanied Cabral on the voyage that resulted in the discovery of Brazil, but he perished in heavy seas off the African coast. He is also called Bartholomew Diaz.