A small city in Jujuy Province, Argentina, on the border with Bolivia. / A river that forms part of the border between Argentina and Bolivia.

(informal) A reprimand, reproach, or lecture.

A religious thanksgiving holiday of the Oromo people of Ethiopia, occurring at the beginning of spring.

(biology, game theory) A model for the evolution and maintenance of informative communication between relatives, developed to explain begging behaviour in chicks.