Macedonia volume 8 page 5
Montenegro volume 8 page 175
Tirane volume 13 page 69
Middle East volume 8 page 124
Arabian Peninsula volume 1
page 157
Cyprus volume 3 page 237
Egypt volume 4 page 110
Iraq volume 6 page 152
Jordan volume 7 page 34
Lebanon volume 7 page 121
Saudi Arabia volume 12 page 44
Turkey volume 13 page 112
Yemen volume 15 page 91
history
Byzantine Empire volume 2 page 159
Islam volume 6 page 165
Istanbul volume 6 page 171
WorldWar I volume 15 page 63
Yugoslavia volume 15 page 95
Ouagadougou (capital city of Burkina
Faso)
MAIN ARTICLE volume 9 page 157
MORE TO EXPLORE
Burkina Faso volume 2 page 151
ounce (unit of measure)
common abbreviations table, volume 1
page 8
measurement volume 8 page 90
Our Lady of Peace, Basilica of (church
in Yamoussoukro, Cote d’Ivoire) picture,
volume 15 page 85
out (sports)
softball volume 12 page 123
Outback (region in Australia)
Australia volume 1 page 229
BRITANNICA STUDENT ENCYCLOPEDIA Outback 187
outboard motorboat (watercraft)
boat volume 2 page 98
outer ear (anatomy)
ear volume 4 page 87, picture, volume 4
page 87
Outer Mongolia (country in Asia): see in
index Mongolia
outer space: see in index space
outfield (sports)
baseball volume 2 page 30, picture, volume
2 page 31
softball volume 12 page 122
“Outsiders, The” (work by Hinton)
Hinton volume 6 page 58
ova (animal reproductive cells): see in
index ovum
Oval Office (office in the White House,
Washington, D.C.) picture, volume 14
page 34
Ovambo (people)
Namibia volume 9 page 6
ovaries (animal and human): see in index
ovary
ovary (animal and human)
endocrine system volume 4 page 136,
picture, volume 4 page 135
reproductive system volume 11 page 48
human reproductive system picture,
volume 11 page 47, picture, volume
11 page 48
overseas trade: see in index international
trade
oviduct (anatomy): see in index fallopian
tube
Oviraptor (dinosaur)
MAIN ARTICLE volume 9 page 158, picture,
volume 9 page 158
MORE TO EXPLORE
dinosaurs in scale picture, volume 4
page 53
ovulation (physiology)
reproductive system volume 11 page 48
ovule (botany)
parts of a flower picture, volume 5
page 38
ovum (animal reproductive cell)
egg volume 4 page 108
Owens, Jesse (U.S. athlete)
MAIN ARTICLE volume 9 page 159, picture,
volume 9 page 159
owl (bird)
MAIN ARTICLE volume 9 page 159, picture,
volume 9 page 159
MORE TO EXPLORE
birds of prey volume 2 page 80
owl monkey (primate): see in index night
monkey
ox (mammal)
rice planting work picture, volume 1
page 48
oxeye daisy (flowering plant)
daisy volume 4 page 6
oxygen (chemical element)
air volume 1 page 51
algae volume 1 page 76
anatomy and physiology
blood volume 2 page 92, picture, volume
3 page 40
cardiovascular system picture, volume
3 page 39
respiratory system volume 11 page 54
lung volume 7 page 184
atmosphere volume 1 page 223
combustion volume 3 page 165
fire volume 5 page 25
firefighting volume 5 page 25
living thing volume 7 page 168
ozone volume 9 page 160
photosynthesis volume 10 page 78
forest volume 5 page 54
plankton volume 10 page 94
plant volume 10 page 96
water molecule picture, volume 8
page 155
oxygen cycle
air volume 1 page 51
photosynthesis picture, volume 10
page 78
oyster (mollusk)
jewelry and gems volume 7 page 24
mollusk volume 8 page 156
shell volume 12 page 80
oz. (unit of measure): see in index ounce
Ozark Mountains (mountain range in
the U.S.)
waterfall picture, volume 1 page 180
ozone (chemistry)
MAIN ARTICLE volume 9 page 160
MORE TO EXPLORE
atmosphere volume 1 page 223
ozone hole picture, volume 9 page 160
ozone hole (atmospheric phenomenon)
Antarctic ozone hole picture, volume 9
page 160
ozone layer (atmospheric region)
atmosphere volume 1 page 223
ozone volume 9 page 160, picture, volume
9 page 160
pollution volume 10 page 118
PA (Palestinian government): see in index
Palestinian Authority
Pachomius, Saint (Egyptian monk)
monk volume 8 page 166
Pachycephalosaurus (dinosaur)
dinosaurs in scale picture, volume 4
page 53
Pacific,War of the (South American
history, 1879-83)
Bolivia volume 2 page 103
Peru volume 10 page 65
Pacific Ocean
MAIN ARTICLE volume 10 page 4
MORE TO EXPLORE
exploration
Balboa volume 2 page 11
Cook volume 3 page 193
Drake volume 4 page 70
Magellan volume 8 page 15
geography and geology
coral island picture, volume 10 page 4
ocean volume 9 page 117
oceanic island picture, volume 6
page 166
Panama City picture, volume 10
page 24
Ring of Fire volume 11 page 66
volcano volume 14 page 100
trans-Pacific container ship picture, volume
10 page 5
Pacific Plate (geology)
Pacific Ocean volume 10 page 4
188 outboard motorboat BRITANNICA STUDENT ENCYCLOPEDIA
plate tectonics volume 10 page 98
Ring of Fire volume 11 page 66
Pacific salmon (fish)
salmon volume 12 page 22
pacifism (political philosophy)
peace movements volume 10 page 44
pack (animal behavior)
dog volume 4 page 61
jackal volume 7 page 4
pack ice (ice formation)
Arctic Ocean volume 1 page 173
paddy (agriculture)
images
Cambodia picture, volume 3
page 18
India picture, volume 11 page 63
Japan picture, volume 7 page 135
rice volume 11 page 63
Paekche (ancient kingdom in Korea)
North Korea volume 7 page 80
South Korea volume 7 page 83
Paektu, Mount (mountain in North