In Mexican system of government, an ejido (Spanish pronunciation: [eˈxiðo], from Latin exitum) is an area of communal land used for agriculture, on which community members individually farm designated parcels and collectively maintain communal holdings. Ejidos are registered with Mexico's National Agrarian Registry (Registro Agrario Nacional). The system of ejidos was based on an understanding of the Aztec calpulli and the medieval Spanish ejido.