- Pe·dro de [pe–th raw th e] /ˈpɛ ðrɔ ðɛ/, 1487–1537, Spanish soldier and explorer: founder of the first colony of Buenos Aires 1536?.
- a city in W central Argentina.
- a city in W central Argentina, in the foothills of the Sierra de los Paramillos: largely destroyed by an earthquake in 1861; commercial centre of an intensively cultivated irrigated region; University of Cuyo (1939). Pop: 1 072 000 (2005 est)
- Pedro de (ˈpeðro de). died 1537, Spanish soldier and explorer; founder of Buenos Aires (1536)