Browse the Concise Encyclopedia
- 'abbasid dynasty
- 'abd al-samad
- 'abduh, muhammad
- 'adullam
- 'akko
- 'alawiyyah
- a priori
- aardvark
- aaron
- aarp
- abacus
- abalone
- abbey
- abbey theatre
- abbott and costello
- abbreviation
- abc
- abdominal cavity
- abdominal muscle
- abenaki
- aberdeen
- aberration
- aberration of starlight
- aberystwyth
- abhayagiri
- abhidhamma pitaka
- abhidharmakosa
- abhijna
- abidjan
- abilene
- abnormal psychology
- abo blood-group system
- abolitionism
- abominable snowman
- abortion
- abraham
- abraham, plains of
- abrasives
- abruzzo
- absalom
- absaroka range
- abscess
- absentee ownership
- absolute value
- absolute zero
- absolution
- absolutism
- absorption
- abstract art
- abstract expressionism
- abu muslim
- abu qir bay
- abu simbel
- abu zaby
- abydos
- abyssal plain
- abyssinian cat
- acacia
- académie française
- academy
- academy awards
- acadia
- acadia national park
- acadia university
- acadian orogeny
- acanthus
- acceleration
- accelerometer
- accent
- acceptance
- acclimatization
- accordion
- account payable
- account receivable
- accounting
- accused, rights of the
- acehnese war
- acetaminophen
- acetate
- acetic acid
- acetone
- acetylcholine
- acetylene
- achaean
- achaean league
- achaemenian dynasty
- achelous river
- acheulean industry
- achilles
- achilles painter
- achinese
- acid
- acid rain
- acid-base theory
- ackermann, konrad ernst
- acne
- acoma
- aconite
- acorn
- acoustics