Orinoco River

Orinoco River, a great river in the NE. of South America, rises in the Parimé Mountains, and flowing westward bifurcates, the Cassiquiare channel going southward and joining the Rio Negro, the Orinoco proper continuing westward, north and east through Venezuela, and reaching the Atlantic after a course of 1500 m. by an enormous delta; it receives thousands of tributaries, but cascades half-way up stop navigation.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Original Sin * Orion
Orelli, Conrad von
Orelli, Johann Kaspar von
Orestes
Orfila, M. J. Bonaventure
Organism
Organon
Orgies
Oriflamme
Origen
Original Sin
Orinoco River
Orion
Orissa
Orkney Islands
Orlando
Orleans
Orleans, Dukes of
Orloff
Orme, Robert
Ormolu
Ormonde, James Butler, Duke of