Ci·u·dad Bo·lí·var 
(sē′-däd bō-lēvär, sy-)
(sē′-däd bō-lēvär, sy-) A city of east-central Venezuela on the Orinoco River southeast of Caracas. It was founded in 1764 on the narrows (or angosturas) of the river and was popularly known as Angostura.