| The Columbia Encyclopedia, Sixth Edition. 2001-07. |
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| Arlon to Asbury, Francis |
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| Arlon |
| arm |
| Armada, Spanish |
| armadillo |
| Armageddon |
| Armagh, district, Northern Ireland |
| Armagh, city, Northern Ireland |
| Armagnac |
| Armagnacs and Burgundians |
| Armani, Giorgio |
| armature |
| Armavir |
| Armenia, country, Asia |
| Armenia, city, Colombia |
| Armenian Church |
| Armenian language |
| Armenian literature |
| Armentières |
| Armey, Dick |
| Arminianism |
| Arminius |
| Arminius, Jacobus |
| Armistead, George |
| Armistead, Lewis Addison |
| Armoni |
| armonica |
| armor |
| Armory Show |
| Armour, Philip Danforth |
| Arms, John Taylor |
| arms, coat of |
| Armstrong, Edwin Howard |
| Armstrong, Henry |
| Armstrong, John, 1717?–1795, American pioneer |
| Armstrong, John, 1758–1843, American army officer |
| Armstrong, Lance |
| Armstrong, Louis “Satchmo” |
| Armstrong, Neil Alden |
| Armstrong, Samuel Chapman |
| army |
| Army, United States Department of the |
| armyworm |
| Arnaud, Henri |
| Arnauld |
| Arndt, Ernst Moritz |
| Arne, Thomas Augustine |
| Arnhem |
| Arnhem Land |
| arnica |
| Arnim, Achim von |
| Arnim, Mary Annette (Beauchamp), Countess von |
| Arno, Peter |
| Arno |
| Arnold, Benedict |
| Arnold, Sir Edwin |
| Arnold, Henry Harley |
| Arnold, Matthew |
| Arnold, Thomas |
| Arnold of Brescia |
| Arnoldson, Klas Pontus |
| Arnold von Winkelried |
| Arnolfo di Cambio |
| Arnon |
| Arnstadt |
| Arnulf |
| Arod |
| Aroe Islands |
| Aroer |
| aromatic compound |
| Aroostook |
| Aroostook War |
| Arosa |
| Arosemena Monroy, Carlos Julio |
| Arp, Jean |
| Arpad, chief of the Magyars |
| Arpad, in the Bible |
| Arphaxad |
| Arpino, Cavaliere d’ |
| Arrabal, Fernando |
| arrack |
| Arrah |
| Ar Ramadi |
| Arran, earls of |
| Arran |
| Ar Raqqah |
| Arras |
| Arras, Treaty of |
| Arrau, Claudio |
| Arrebo, Anders |
| arrest |
| Arrhenius, Svante August |
| arrhythmia |
| Arrian |
| Arrow, Kenneth Joseph |
| arrowhead |
| Arrow Lakes |
| arrowroot |
| Arrowsmith, Aaron |
| arrowwood |
| arrowworm |
| Arroyo, Gloria Macapagal |
| Arru Islands |
| Arsaces |
| Arsacids |
| arsenic |
| arsenopyrite |
| arson |
| Arsonval, Arsène d’ |
| art |
| Árta |
| Artagnan, Charles de Batz-Castelmore d’ |
| Artaphernes |
| Artaud, Antonin |
| Artaxerxes I |
| Artaxerxes II |
| Artaxerxes III |
| art conservation and restoration |
| art deco |
| Artem |
| Artemas |
| Artemidorus of Ephesus |
| Artemis |
| Artemisia, ruler of Caria |
| artemisia, in botany |
| Artemisium |
| Artemovsk |
| arteriosclerosis |
| artery |
| Artesia |
| artesian well |
| Artevelde, Jacob van |
| Artevelde, Philip van |
| art galleries |
| art history |
| arthritis |
| Arthropoda |
| Arthur |
| Arthur I |
| Arthur III |
| Arthur, Chester Alan |
| Arthurian legend |
| artichoke |
| artificial elements |
| artificial heart |
| artificial insemination |
| artificial intelligence |
| artificial kidney |
| artificial languages |
| artificial life support |
| artificial limb |
| artificial respiration |
| artificial sweetener |
| Artigas, José Gervasio |
| artillery |
| Art Institute of Chicago |
| art moderne |
| art nouveau |
| Artois |
| arts and crafts |
| art song |
| Artzybasheff, Boris |
| Artzybashev, Mikhail Petrovich |
| Aruba |
| Aruboth |
| Aru Islands |
| arum |
| Arumah |
| Arunachal Pradesh |
| Arundel, Henry Fitzalan, 12th earl of |
| Arundel, Thomas Howard, earl of |
| Arusha |
| Arvad |
| Arvada |
| Arval Brothers |
| Arvida |
| Arvika |
| Aryabhata |
| Aryan |
| Arya Samaj |
| aryl group |
| Arza |
| Arzamas |
A |
| As |
| Asa |
| Asada Goryu |
| Asahel |
| Asahiah |
| Asahikawa |
| Asaiah |
| Asaka |
| Asama, Mount |
| asana |
| Asansol |
| Asaph |
| Asareel |
| Asbestos, town, Canada |
| asbestos, mineral |
| Asbjørnsen, Peter Christian |
| Asbury, Francis |
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| | | The Columbia Encyclopedia, Sixth Edition. Copyright © 2007 Columbia University Press. |
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