Oregon alder, n.
large tree of Pacific coast of North America having hard red wood much used for furniture
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Oregon ash, n.
timber tree of western North America yielding hard light wood; closely related to the red ash
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Oregon cedar, n.
large timber tree of western North America with trunk diameter to 12 feet and height to 200 feet
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Oregon crab apple, n.
small tree or shrub of western United States having white blossoms and tiny yellow or red fruit
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Oregon fir, n.
lofty douglas fir of northwestern North America having short needles and egg-shaped cones
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Oregon grape, n.
ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries
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small shrub with grey-green leaves and yellow flowers followed by glaucous blue berries
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Oregon holly grape, n.
ornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries
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Oregon larch, n.
tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree
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Oregon lily, n.
lily of western North America with showy orange-red purple-spotted flowers
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Oregon maple, n.
maple of western North America having large 5-lobed leaves orange in autumn
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Oregon myrtle, n.
Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood
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Oregon oak, n.
small deciduous tree of western North America with crooked branches and pale grey bark
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Oregon pine, n.
lofty douglas fir of northwestern North America having short needles and egg-shaped cones
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Oregon white oak, n.
small deciduous tree of western North America with crooked branches and pale grey bark
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Oregonian, n.
a native or resident of Oregon
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Oreopteris, n.
3 species of ferns formerly included in genus Dryopteris or Thelypteris
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Oreopteris limbosperma, n.
common European mountain fern having fragrant lemon or balsam scented fronds
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Oreortyx, n.
mountain quail of western United States
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Oreortyx picta palmeri, n.
California partridge; slightly larger than the California quail
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Orestes, n.
(Greek mythology) the son of Agamemnon and Clytemnestra; his sister Electra persuaded him to avenge Agamemnon's death by killing Clytemnestra and Aegisthus
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Orff, n.
German musician who developed a widely used system for teaching music to children (1895-1982)
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Organization for the Prohibition of Chemical Weapons, n.
international organization for chemical disarmament; administers the Chemical Weapons Convention
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Organization of American States, n.
an association including most countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation
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Antigua and Barbuda
Argentina, Argentine Republic
Chile, Republic of Chile
Colombia, Republic of Colombia
Costa Rica, Republic of Costa Rica
Guatemala, Republic of Guatemala
Honduras, Republic of Honduras
El Salvador, Republic of El Salvador, Salvador
Panama, Republic of Panama
Mexico, United Mexican States
Cuba, Republic of Cuba
Haiti, Republic of Haiti
Dominican Republic
Jamaica
Barbados
Trinidad and Tobago, Republic of Trinidad and Tobago
Dominica, Commonwealth of Dominica
Ecuador, Republic of Ecuador
Bahamas, Commonwealth of the Bahamas, Bahama Islands
Bolivia, Republic of Bolivia
Brazil, Federative Republic of Brazil, Brasil
Grenada
Paraguay, Republic of Paraguay
Peru, Republic of Peru
Saint Kitts and Nevis, Federation of Saint Kitts and Nevis, Saint Christopher-Nevis, St. Christopher-Nevis, St. Kitts and Nevis
Saint Lucia, St. Lucia
Saint Vincent and the Grenadines, St. Vincent and the Grenadines
Suriname, Republic of Suriname, Surinam, Dutch Guiana, Netherlands Guiana
United States, United States of America, America, the States, US, U.S., USA, U.S.A.
Uruguay
Venezuela, Republic of Venezuela
Organization of Petroleum-Exporting Countries, n.
an organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum
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Algeria, Algerie, Democratic and Popular Republic of Algeria
Angola, Republic of Angola
Ecuador, Republic of Ecuador
Indonesia, Republic of Indonesia, Dutch East Indies
Iran, Islamic Republic of Iran, Persia
Iraq, Republic of Iraq, Al-Iraq, Irak
Kuwait, State of Kuwait, Koweit
Libya, Socialist People's Libyan Arab Jamahiriya
Nigeria, Federal Republic of Nigeria
Qatar, State of Qatar, Katar, State of Katar
Saudi Arabia, Kingdom of Saudi Arabia
United Arab Emirates
Venezuela, Republic of Venezuela
Organization of the Oppressed on Earth, n.
a Shiite terrorist organization with strong ties to Iran; seeks to create an Iranian fundamentalist Islamic state in Lebanon; car bombs are the signature weapon
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Orient, n.
the countries of Asia
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Oriental Studies, n.
the scholarly knowledge of Asian cultures and languages and people
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Oriental arborvitae, n.
Asiatic shrub or small tree widely planted in United States and Europe; in some classifications assigned to its own genus
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Oriental beetle, n.
introduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses
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Oriental black mushroom, n.
edible east Asian mushroom having a golden or dark brown to blackish cap and an inedible stipe
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