南锥体（西班牙语：Cono Sur, 葡萄牙语：Cone Sul）指的是南美洲位于南回归线以南的地区。一般人们所说的南锥体包括了阿根廷、智利和乌拉圭三国。有时也会包括巴拉圭和巴西的南里奥格兰德州、圣卡塔琳娜州、巴拉那州、圣保罗州。南锥体是南美洲经济最为发达的地区。

Southern Cone (Spanish:Cono Sur, Portuguese:Cone Sul) is a geographic region composed of the southernmost areas of South America, south of and around the Tropic of Capricorn. Traditionally, it covers Argentina, Chile and Uruguay, bounded on the west by the Pacific Ocean, and south to the junction between the Pacific and Atlantic Oceans, which is the closest continental area of Antarctica (1000 km). In terms of social and political geography, the Southern Cone comprises Argentina, Chile, Uruguay, Southern Brazil and sometimes Paraguay.