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Britannica Concise Encyclopedia

Britannica Concise Encyclopedia, published by Encyclopædia Britannica, Inc.
The Britannica Concise Encyclopedia, a condensed version of the Encyclopædia Britannica, offers short, concise, easy-to-read entries on everything from art and zoology to current events and history. Includes statistics, charts, maps and flags.
On this page: Omsk to optometry.
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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
O:  < Previous  5  6  7  8  9  10  Next > 

Omsk (city, Russia)
Onassis, Aristotle (Socrates) (Greek businessman/businesswoman & financier)
Onassis, Jacqueline Kennedy (U.S. First Lady)
Oñate, Juan de (Spanish-American explorer)
Onega, Lake (lake, Russia)
Oneida (city, New York)
Oneida Community (Religion)
Onin War (East Asia)
onion (plant, vegetable)
Onsager, Lars (American-Norwegian chemist)
Ontario (province, Canada)
Ontario, Lake (lake, Canada/New York)
ontology (information science)
onychophoran (in zoology)
onyx (mineral)
Oort cloud (swarm of comets orbiting the sun)
Op art (movement)
opal (mineral)
OPEC (organization)
open cluster (Astronomy)
Open Door policy (in politics)
open-hearth process (Technology)
opera (in drama, music, theater)
operetta (in music)
operon (in genetics)
Ophite (Religion)
ophthalmology (branch of medicine)
Ophüls, Max (American-German-French filmmaker)
opium (drug)
Opium Wars (war, China/England)
opportunity cost (investment)
optical activity (in optics)
optics (branch of optics, physics)
Optimates and Populares (Ancient Europe)
optometry (branch of medicine)