[awr-uh-noh-koh, ohr-; Sp. aw-ree-naw-kaw] 
| a river in N South America, flowing N from the border of Brazil, along the E border of Colombia, and NE through Venezuela to the Atlantic. 1600 mi. (2575 km) long. |
| O·ri·no·co (ôr'ə-nō'kō, ōr'-) A river of Venezuela flowing more than 2,414 km (1,500 mi), partly along the Colombia-Venezuela border, to the Atlantic Ocean. The mouth of the river was probably discovered by Columbus in 1498. |
əˈnoʊ