OAS, Organization of American States - an association of countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation

South American country, South American nation - countries occupying the South American continent

Patagonia - region in southern South America between the Andes and the South Atlantic

Triple Frontier - the border area where Argentina and Brazil and Paraguay meet; an active South American center for contraband and drug trafficking and money laundering; a suspected locale for Islamic extremist groups

Buenos Aires, capital of Argentina - capital and largest city of Argentina; located in eastern Argentina near Uruguay; Argentina's chief port and industrial and cultural center

Cordova, Cordoba - a city in central Argentina; site of a university founded in 1613

pampas - the vast grassy plains of northern Argentina

Tierra del Fuego - an archipelago off southern South America; separated from the continent by the Strait of Magellan; islands are administered by Chile and by Argentina

Aconcagua - the highest mountain in the western hemisphere; located in the Andes in western Argentina (22,834 feet high)

Andes - a mountain range in South America running 5000 miles along the Pacific coast

Bonete - a mountain in the Andes in Argentina (22,546 feet high)

Cachi - a mountain in the Andes in Argentina (22,047 feet high)

El Libertador - a mountain in the Andes in Argentina (22,047 feet high)

El Muerto - a mountain peak in the Andes on the border between Argentina and Chile (21,457 feet high)

Galan - a mountain peak in the Andes in Argentina (21,654 feet high)

Iguassu, Iguassu Falls, Iguazu, Iguazu Falls, Victoria Falls - a large waterfall on the border between Argentina and Brazil

Laudo - a mountain peak in the Andes in Argentina (20,997 feet high)

Llullaillaco - a mountain in the Andes on the border between Argentina and Chile (22,057 feet high)

Mercedario - a mountain in the Andes in Argentina (22,210 feet high)

Nacimiento - a mountain peak in the Andes in Argentina (21,302 feet high)

Ojos del Salado - a mountain in the Andes on the border between Argentina and Chile (22,572 feet high)

Parana, Parana River - a South American river; tributary of Rio de la Plata

Pissis - a mountain in the Andes in Argentina (22,241 feet high)

La Plata, Plata River, Rio de la Plata - an estuary between Argentina and Uruguay

South America - a continent in the western hemisphere connected to North America by the Isthmus of Panama

Tupungato - a mountain in the Andes on the border between Argentina and Chile (22,310 feet high)

Argentinian - a native or inhabitant of Argentina