| OB |
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abbreviation - Obstetrician
- Obstetrics
- Obstetric
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| Obwalden |
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proper noun
- A canton of Switzerland.
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| Oceania |
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proper noun
- A geographical region composed of many islands (Melanesia, Micronesia, and Polynesia), Australia and New Zealand. It is located south of Asia, north of Antarctica and at the border between the Indian Ocean and the Pacific Ocean.
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| Oceanic |
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adjective
- Of or pertaining to Oceania; Oceanian.
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| Oder |
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proper noun
- (rivers) A river of central Europe that flows from the Czech Republic through Poland and Germany to the Baltic Sea.
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| Odessa |
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proper noun - A Ukrainian port on the Black Sea
- A city in United States state of Texas
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| Ohio |
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proper noun
- A (USstate) Capital and largest city: Columbus.
- A river flowing SW from Pennsylvania to the Mississippi River in Illinois.
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| oka |
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noun
- a unit of weight in Egypt (and formerly Turkey): 37 grams (one twelfth ratl) in Egypt, 320 grams in Aleppo, 213.39 grams in Beirut, 240 grams in Jerusalem.
- a unit of volume in Egypt (and formerly Turkey) corresponding to about 1.2 litres.
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| Okinawa |
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proper noun
- A prefecture of Japan
- A city in the Okinawa prefecture
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| Okla. |
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abbreviation - Oklahoma
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| Oklahoma |
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proper noun
- A state of the United States of America. Capital and largest city: Oklahoma City.
- A w:Oklahoma_County, county in the State of Oklahoma.
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| Oklahoma City |
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proper noun
- The capital and largest city of the US state of Oklahoma
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| Old World |
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proper noun
- The Eastern Hemisphere, especially Europe and the Near East
- The known world before the discovery of the Americas
adjective
- Of, or relating to the Old World
- pre-Columbian
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| olives |
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noun
- (plural of, olive)
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| Olympia |
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proper noun
- An ancient city in Greece, home of the very first Olympic Games, see w:Olympia, Greece
- The capital city of the US state of Washington, see w:Olympia, Washington
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| Olympus |
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proper noun
- The highest mountain in Greece(see �λ�μ�ο�)
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| Oman |
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proper noun
- Country in the Middle East. Official name: Sultanate of Oman.
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| Ontario |
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proper noun - A province in eastern Canada that has Toronto as its capital.
- A lake between Ontario province and New York State.
- A city in California.
- A town in Oregon.
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| Oporto |
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proper noun
- The second-largest city of Portugal.
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| Orange |
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proper noun
- A town in France.
- The name of the Dutch Royal House.
- Prince or Princess of Orange. Title of the first-born to the Dutch Royal House.
adjective
- Relating to the Orange Order.
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| Orange Free State |
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proper noun - A province of South Africa, formerly a Dutch colony bordering the Orange River.
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| Ore. |
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abbreviation - Oregon
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| Oregon |
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proper noun
- A northwestern state of the United States of America. Capital: Salem.
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| Orinoco |
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proper noun
- A South American river flowing 1600 miles (2410 km) from Brazil through Venezuela to the Atlantic Ocean.
- The Orinoco river basin of Venezuela.
adjective
- Of or pertaining to the Orinoco river basin of Venezuela.
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| Orissa |
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proper noun - State in eastern India which has Bhubaneshwar as its capital.
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| Orkney Islands |
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proper noun
- A group of islands off north-east Scotland.
- The region of Scotland comprising these islands.
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| Orlando |
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proper noun
- (given name, male) of Italian origin, equivalent to Roland.
- A surname derived from the given name.
- A town in Florida, see Wikipedia:Orlando, Florida.
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| Orleans |
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proper noun
- City in France. Also Orléans.
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| Oslo |
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proper noun
- The capital and a county municipality of Norway. Formerly called Kristiania.
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| ossa |
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noun
- Plural of os.
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| Ossetia |
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proper noun
- A region in the Caucasus on the border of Russia and Georgia.
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| Ostend |
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proper noun
- The largest coastal city of Belgium.
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| Ostia |
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proper noun
- an ancient town in Italy at the mouth of the Tiber; the harbour of ancient Rome
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| Ostrava |
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proper noun - City in the Czech Republic
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| Otaheite |
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proper noun
- (obsolete) Early form of the island of Tahiti.
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| Ottawa |
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proper noun
- The capital of Canada, located in the province of Ontario.
- A river flowing SE between Ontario and Quebec into the St. Lawrence River.
- A city in Illinois.
- A town in Ohio.
- An Algonquian people closely related to the Ojibwe; also spelt Ottowa.
- The Ottawa dialect of Ojibwe; also spelt Odawa or odaawaa, Odaawaa.
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| Ouagadougou |
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proper noun
- The capital of Burkina Faso.
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| Oulu |
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proper noun - A city in Finland.
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| Outer Hebrides |
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proper noun (the)
- An archipelago of the Hebrides in Scotland, separated from the Inner Hebrides by the Little Minch.
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| Overijssel |
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proper noun
- A province of the Netherlands.
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| Oxford |
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proper noun
- A city in England famous for its university.
- Oxford University.
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| Oxfordshire |
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proper noun
- A midland county of England bordered by Buckinghamshire, Gloucestershire, Berkshire, Warwickshire and Northamptonshire.
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