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November 24, 2009  
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 Oa - Ol
 • Om - Orh
 • Ori - Oz
 •  O
 •  Oahe Dam
 •  Oahu
 •  oak
 •  Oak Creek
 •  Oak Forest
 •  Oakland
 •  Oak Lawn
 •  Oakley, Annie
 •  Oak Park
 •  Oak Ridge
 •  Oakville
 •  oasis
 •  Oates, Joyce Carol
 •  Oates, Titus
 •  oath
 •  oats
 •  Oaxaca, state, Mexico
 •  Oaxaca, city, Mexico
 •  Ob
 •  Obadiah, persons in the Bible
 •  Obadiah, book of the Bible
 •  Obaidallah
 •  Obal
 •  Oban
 •  Obasanjo, Olusegun
 •  obbligato
 •  Obdorsk
 •  Obed
 •  Obed-edom
 •  Obed Wild and Scenic River
 •  Obeid, El
 •  obelisk
 •  Oberalp
 •  Oberammergau
 •  Oberhausen
 •  Oberholtzer, Ellis Paxson
 •  Oberland, Bernese
 •  Oberlin, Jean Frederic
 •  Oberlin College
 •  Oberon
 •  obesity
 •  Obil
 •  object-oriented programming
 •  oblast
 •  obliquity of the ecliptic
 •  oboe
 •  Obote, Apollo Milton
 •  Obrecht, Jacob
 •  Obregon, Alvaro
 •  Obrenovic
 •  Obrenovich
 •  O'Brien, Conor Cruise
 •  O'Brien, Edna
 •  O'Brien, Flann
 •  O'Brien, William
 •  O'Brien, William Smith
 •  obscenity
 •  observatory
 •  observatory, orbiting
 •  obsidian
 •  obstetrics
 •  Obuasi
 •  Obuchi, Keizo
 •  Obwalden
 •  Ocala
 •  ocarina
 •  O'Casey, Sean
 •  Occam, William of
 •  occasionalism
 •  Occitan
 •  Occleve, Thomas
 •  Occom, Samson
 •  occultation
 •  occultism
 •  occupational disease
 •  Occupational Safety and Health Administration
 •  ocean
 •  Ocean City
 •  Oceania
 •  Oceanic art
 •  Oceanic languages
 •  oceanids
 •  Ocean Island
 •  oceanography
 •  ocean perch
 •  Oceanside
 •  Oceanus
 •  ocellus
 •  ocelot
 •  Ochakov
 •  ocher
 •  Ochino, Bernardino
 •  Ochoa, Severo
 •  Ocho Rios
 •  Ochrida
 •  Ochs, Adolph S.
 •  Ockeghem, Johannes
 •  Ockham, William of
 •  Ocmulgee
 •  Ocmulgee National Monument
 •  Oconee
 •  O'Connell, Daniel
 •  O'Connor, Feargus
 •  O'Connor, Flannery
 •  O'Connor, Frank
 •  O'Connor, John Joseph
 •  O'Connor, Rory
 •  O'Connor, Sandra Day
 •  O'Connor, Thomas Power
 •  octahedron
 •  octane number
 •  octave
 •  Octavia
 •  Octavian
 •  October
 •  October Revolution
 •  octopus
 •  Oda Nobunaga
 •  Odda
 •  ode
 •  Oded
 •  Odenathus, Septimius
 •  Odenburg
 •  Odense
 •  Odenwald
 •  Oder
 •  Oder-Neisse line
 •  Odessa, city, Ukraine
 •  Odessa, city, United States
 •  Odets, Clifford
 •  Odin
 •  Odo
 •  Odoacer
 •  odometer
 •  O'Donnell, Hugh Roe
 •  O'Donnell, Leopoldo
 •  O'Donoju, Juan
 •  Odovacar
 •  Odra
 •  Odria, Manuel
 •  Odum, Howard Washington
 •  Odysseus
 •  Odyssey
 •  Oe, Kenzaburo
 •  OECD
 •  Oecolampadius, Johannes
 •  Oedipus
 •  Oedipus complex
 •  Oehlenschlager, Adam Gottlob
 •  Oeneus
 •  Oenone
 •  Oenothera
 •  Oersted, Hans Christian
 •  Oeta
 •  O'Faolain, Sean
 •  Ofen, German name for Buda, Hungary
 •  Ofen, Alpine pass, Switzerland
 •  Offa
 •  Offaly
 •  Offa's Dyke
 •  Offenbach, Jacques Levy
 •  Offenbach am Main
 •  offertory
 •  Office of Price Administration
 •  Office of Strategic Services
 •  Office of War Information
 •  Offner, Richard
 •  offset
 •  Offutt Air Force Base
 •  O'Flaherty, Liam
 •  Og
 •  Ogaden
 •  Ogasawara-gunto
 •  Ogata Kenzan
 •  Ogata Korin
 •  Ogbomosho
 •  Ogden, city, United States
 •  Ogden, river, United States
 •  Ogdensburg
 •  Oge, Vincent
 •  ogham
 •  Ogier the Dane
 •  Oglala Sioux
 •  Oglesby, Richard James
 •  Oglethorpe, James Edward
 •  Ogoki
 •  Ogooue
 •  O'Gorman, Juan
 •  Ogowe
 •  OGPU
 •  O'Grady, Standish
 •  O'Grady, Standish Hayes
 •  Ogyges
 •  Ogygia
 •  Oh, Sadaharu
 •  Ohad
 •  O'Hara, Frank
 •  O'Hara, John
 •  Ohel
 •  O. Henry
 •  O'Higgins, Ambrosio
 •  O'Higgins, Bernardo
 •  Ohio, state, United States
 •  Ohio, river, United States
 •  Ohio and Erie Canal
 •  Ohio Company
 •  Ohio Company of Associates
 •  Ohio State University
 •  Ohio University
 •  Ohira, Masayoshi
 •  Ohlin, Bertil
 •  Ohm, Georg Simon
 •  ohm
 •  ohmmeter
 •  Ohm's law
 •  Ohrid
 •  Ohrid, Lake
 •  Ohthere
 •  oil beetle
 •  oilbird
 •  Oil City
 •  oilcloth
 •  oil gas
 •  oil industry
 •  oil of bitter almond
 •  oil of vitriol
 •  oil of wintergreen
 •  oils
 •  oil spill
 •  oilstone
 •  Oirat Autonomous Oblast
 •  Oise, department, France
 •  Oise, river, Belgium and France
 •  Oisin
 •  Oistrakh, David Feodorovich
 •  Oita
 •  Ojeda, Alonso de
 •  Ojibwa
 •  Ojos del Salado
 •  Ojukwu, Chukwuemeka Odumegwu
 •  Oka, village, Canada
 •  Oka, river, central European Russia
 •  Oka, river, Siberian Russia
 •  Okada, Keisuke
 •  Okanagan Lake
 •  Okanogan
 •  okapi
 •  Okara
 •  Okavango
 •  Okayama
 •  Okeechobee, Lake
 •  Okeechobee Waterway
 •  O'Keeffe, Georgia
 •  Okefenokee Swamp
 •  Okeghem, Jean d'
 •  Okhotsk, Sea of
 •  Okhrida
 •  Okinawa
 •  Oklahoma
 •  Oklahoma, University of
 •  Oklahoma City
 •  Oklahoma State University
 •  Okmulgee
 •  okra
 •  Okubo, Toshimichi
 •  Okuma, Shigenobu
 •  Olaf I
 •  Olaf II
 •  Olaf V
 •  Olaf Guthfrithson
 •  Olajuwon, Hakeem
 •  Oland
 •  Olathe
 •  Olbers, Heinrich Wilhelm Matthaus
 •  Olbia
 •  Olcott, Henry Steel
 •  old age
 •  old-age pension
 •  Old Castile
 •  Oldcastle, Sir John
 •  Old Catholics
 •  Old Church Slavonic
 •  Oldenbarneveldt, Johan van
 •  Oldenburg, Claes
 •  Oldenburg, former state, Germany
 •  Oldenburg, city, Germany
 •  Old English
 •  old English sheepdog
 •  Old Faithful
 •  Oldfield, Anne
 •  Oldham, John, colonist in New England
 •  Oldham, John, English poet and satirist
 •  Oldham
 •  Old Hundredth
 •  Old Ironsides
 •  Old Lyme
 •  Oldman
 •  Old Man of the Mountain, in Islamic history
 •  Old Man of the Mountain, rock formation, United States
 •  old-man's-beard
 •  Old Norse literature
 •  Old Northwest
 •  Old Orchard Beach
 •  Old Pretender
 •  Old Red Sandstone
 •  Olds
 •  Old Sarum
 •  Old Stone Age
 •  Old Style dates
 •  Old Testament
 •  Olduvai Gorge
 •  Old Vic
 •  Olean
 •  oleander
 •  oleaster
 •  olefin
 •  Oleg
 •  Olekma
 •  Olenek
 •  oleomargarine
 •  Oleron
 •  Olesha, Yuri
 •  oleum
 •  oligarchy
 •  Oligocene epoch
 •  oligopoly
 •  oligosaccharide
 •  Olimbos
 •  Olinda
 •  Oliphant, Laurence
 •  Oliphant, Margaret Oliphant (Wilson)
 •  Olisipo
 •  Olitski, Jules
 •  Oliva, Peace of
 •  Olivares, Gaspar de Guzman, conde-duque de
 •  olive
 •  olive oil
 •  Oliver, Andrew
 •  Oliver, Isaac
 •  Oliver, King
 •  Olives, Mount of
 •  Olivier, Isaac
 •  Olivier, Laurence Kerr, Baron Olivier of Brighton
 •  Olivier, Sydney Haldane Olivier, 1st Baron
 •  olivine
 •  Ollivant, Alfred
 •  Ollivier, Emile
 •  olm
 •  Olmec
 •  Olmedo, Jose Joaquin
 •  Olmsted, Frederick Law
 •  Olmutz
 •  Olney, Jesse
 •  Olney, Richard
 •  Olomouc
 •  Olonos, Mount
 •  Olson, Charles
 •  Olson, Floyd Bjornstjerne
 •  Olsztyn
 •  Olten
 •  Oltenia
 •  Olympia, city, United States
 •  Olympia, city, ancient Greece
 •  Olympiad
 •  Olympian
 •  Olympias
 •  Olympic elk
 •  Olympic games
 •  Olympic Mountains
 •  Olympio, Sylvanus
 •  Olympus
 •  Olympus, Mount
 •  Olynthus

The Columbia Electronic Encyclopedia Copyright © 2009, Columbia University Press.
Licensed from Columbia University Press. All rights reserved.





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The Columbia Electronic Encyclopedia Copyright © 2009, Columbia University Press.
Licensed from Columbia University Press. All rights reserved.

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