Oribe,
Manuel oribi
oriel Orientale orientation
Origen original sin Orillia Orinoco
oriole Orion, in Greek mythology Orion, in astronomy Orion Nebula Orissa Oriya
Orizaba, city, Mexico
Orizaba, mountain,
Mexico Orkhan
Orkhon Orkney Islands Orlando, Italian form of Roland Orlando, Vittorio Emanuele Orlando, city, United States Orleanais Orleans,
French royal family Orleans,
Charles, duc d' Orleans,
Gaston, duc d' Orleans,
Henrietta Anne, duchesse d' Orleans,
Henri Philippe Marie, prince d' Orleans,
Louis, duc d' Orleans,
Louis Philippe Joseph, duc d' Orleans,
city, France Orleans,
Ile d' Orley,
Bernard van Orlon
Orlov, Aleksey
Grigoryevich, Count Orlov,
Grigori Grigoryevich, Count Orly
Ormandy, Eugene
Ormazd Ormerod, Eleanor Anne ormolu Ormond
Beach Ormonde,
James Butler, 12th earl and 1st duke of Ormonde,
James Butler, 2d duke of Ormonde,
James Butler, 5th earl of Ormonde,
Thomas Butler, 10th earl of Ormskirk
Ormulum Ormuz Ormuzd
ornament, in
architecture ornament,
in music Ornan
Orne ornithopter Oromo Oromocto
Oronsay Orontes Orosius,
Paulus Oroville
Dam Orozco,
Jose Clemente Orpah
Orpen, Sir William
orphan orphan drug orphan trains Orpheus Orphic
Mysteries orphism
orpine Orr, Bobby Orr, James Lawrence Orrefors Orrery,
Charles Boyle, 4th earl of Orrery,
Roger Boyle, 1st earl of orrisroot
Orrmulum Orrum, Eilley Ors, Eugenio d' Orsay, Alfred Guillaume Gabriel, count
d' Orsha Orsini Orsini,
Felice Orsk
Ortega Saavedra,
Daniel Ortega
y Gasset, Jose Ortelius,
Abraham orthoclase
feldspar orthodontics
Orthodox Eastern
Church orthopedics
Ortles Orton, Joe Ortona Ortygia
Oruro Orvieto Orwell,
George oryx
Os Osage, indigenous people of North America
Osage, river, United
States Osage
orange Osaka
O Salutaris Hostia
Osama bin Laden
Osawatomie
Osborn, Henry Fairfield
Osborne, Dorothy
Osborne, John
Osborne, Thomas
Burr Osborne,
Thomas Mott Osborne
House Oscan
Oscar I Oscar II Osceola
oscillator, electronic
oscilloscope
Osee Osel Osgood,
Herbert Levi Osh
O'Shaughnessy,
Arthur William Edgar Oshawa
Oshea O-shima Oshkosh
Oshogbo Osiander, Andreas osier Osijek
Osipenko
Osiris Oskaloosa Oskarshamn
Oskemen Osler, Sir William Oslo Osman
Osman I Osman Nuri Pasha Osmena, Sergio osmium osmosis
Osnabruck Osnappar Osorio, Oscar Osorno osprey
Osroene Oss Ossa
Ossetia Ossetian Military Road Ossian Ossietzky,
Carl von Ossining
Ossoli, Marchesa
Ossory, Thomas
Butler, earl of Ossory
Ostade, Adriaen
van Ostend
Ostend Manifesto
osteomyelitis
osteopathy
osteoporosis
Osterman, Andrei
Ivanovich, Count Ostersund
Ostfold Ostia ostinato
ostracism Ostrava ostrich
Ostrogoths
Ostroleka Ostrovsky, Aleksandr Nikolayevich
Ostwald, Wilhelm
O'Sullivan, Timothy
H. O'Sullivan
Dam Osuna,
Pedro Tellez Giron, duque de Oswald,
Saint Oswald,
Lee Harvey Oswego,
city, United States Oswego,
river, United States Oswego
tea Oswestry
Oswiecim Oswy Otaru
Otfried von Weissenburg
Othman Othman I Othniel
Otho Otho, Marcus Salvius Otis, Bass Otis, Elisha Graves Otis, Harrison Gray, 1765–1848, American
political leader Otis,
Harrison Gray, 1837–1917, American soldier and journalist Otis, James Oto Otomi
otosclerosis
Otranto Otsego Lake Otsu ottava
rima Ottawa,
indigenous people of North America Ottawa,
city, Canada Ottawa,
cities, United States Ottawa,
river, Canada Ottawa,
University of otter
Otter, Peaks of
Otterbein, Philip
William Otterburn
otterhound
Otto I, Holy Roman
emperor Otto
II, Holy Roman emperor Otto
III, Holy Roman emperor Otto
IV, Holy Roman emperor Otto
I, king of Bavaria Otto
I, king of Greece Otto,
Austrian archduke Otto,
Frei Otto,
Nikolaus August Ottocar
I Ottocar II
Ottoman Empire
Ottonian art
Otto of Freising
Otto the Great
Ottumwa Otus Otway,
Thomas Otztal
Alps ouabain
Ouachita Ouachita Mountains Ouagadougou ouakari Ouargla
Ouchy Oud, Jacobus Johannes Pieter Oudenaarde Oudh, historic region, India Oudh, town, India Oudinot, Nicolas Charles Oudjda Oudry,
Jean Baptiste Ouessant
Ouezzane Ougree Ouida
Ouidah Oujda Oulu
ounce, in zoology
ounce, unit of
measurement Ourense
Our Father
Ourique Ouro Preto Ourthe Ouse
Ousmane, Sembene
Outer Barrier
Outer Hebrides
Outer Mongolia
outer space
outrigger Ouwe, Hartmann von ovalbumin ovary ovenbird
Overbeck, Johann
Friedrich Overbury,
Sir Thomas Overijssel
Overland Park
Overland Trail
Overmountain
Victory National Historic Trail over-the-counter
overture Ovid oviduct
Oviedo Ovoca ovolo
ovum Owain Glyndwr Owain Gwynedd Owatonna Owen,
John Owen,
Sir Richard Owen,
Robert Owen,
Robert Dale Owen,
Wilfred Owen
Falls Owen
Glendower Owens,
Jesse Owens
Owensboro Owen Sound Owen Stanley Range OWI owl
Owl and the Nightingale,
The Owo Owosso Owyhee
ox oxalic acid oxalis Oxenstierna,
Count Axel Gustafsson oxeye
Oxford, Edward
de Vere, 17th earl of Oxford,
Robert Harley, 1st earl of Oxford,
city, England Oxford,
cities, United States Oxford,
Provisions of Oxford
and Asquith, Herbert Henry Asquith, 1st earl of Oxford
Group Oxford
movement Oxford
sheep Oxfordshire
Oxford University
oxidases oxidation and reduction oxidation number oxidative phosphorylation oxide Oxnam,
Garfield Bromley Oxnard
Oxon oxpecker Oxus
oxyacetylene torch
oxygen oxygen tent oxy group oxytocin
Oyama, Iwao
Oyo Oyono, Ferdinand Leopold oyster Oyster
Bay oyster
catcher oyster
plant Oz, Amos
Ozaki, Yukio
Ozanam, Antoine
Frederic Ozark
Ozark Mountains
Ozark National
Scenic Riverways Ozarks,
Lake of the Ozarks,
the Ozawa,
Seiji Ozd Ozenfant, Amedee Ozias Ozick,
Cynthia Ozni
ozone ozone layer The Columbia Electronic Encyclopedia Copyright © 2003, Columbia
University Press.
