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Columbia Encyclopedia

Columbia Electronic Encyclopedia, published by Columbia University Press
The Columbia Electronic Encyclopedia contains entries on people, places, events, historical facts and terms, with bibliographies for further reading.
On this page: Oneida to opposition.
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Title Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9
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Oneida (city, New York)
Oneida Lake (lake, New York)
Oneonta (city, New York)
onion (plant, vegetable)
Onitsha (city, Nigeria)
Ono (ancient city)
onomatopoeia (in poetry, literature)
Onomichi (city, Japan)
Onondaga Lake (lake, New York)
Ontario (province, Canada)
Ontario (city, California)
Ontario, Lake (lake, Canada/New York)
Onychophora (in zoology)
onyx (mineral)
oolite (mineral)
Oostende (city, Belgium)
op art (movement)
Opa-Locka (city, Florida)
opal (mineral)
Opava (city, Czech Republic)
Opelika (city, Alabama)
Opelousas (city, Louisiana)
Open Door (in politics)
open education (in education)
open enrollment (in education)
Open University (university, England)
Opéra (organization, France)
opera (in drama, music, theater)
operational amplifier (in electronics)
operetta (in music)
operon (in genetics)
Ophel (geographical area, Jerusalem)
Ophelia (in astronomy)
ophicleide (instrument)
Ophion (in Greek Mythology)
Ophites (in Christianity)
Ophrah (ancient city, West Bank)
ophthalmology (branch of medicine)
ophthalmoscope (instrument)
opium (drug)
Opium Wars (war, China/England)
Opobo (city, Nigeria)
Opole (city, Poland)
Oporto (city, Portugal)
Oppland (county, Norway)
Opportunity (city, Washington)
opposition (in astronomy)