| American Samoa | Amoeboid | America |
| American Football Conference | Amphibia | America the Beautiful |
| American National Standards InstituteThe American National Standards Institute (ANSI) is a private, non-profit standards organization that produces industrial standards in the United States. It is a member of ISO and IEC. ANSI's standards fall in many areas. In computing, ANSI standardized t | AmbiguityA word, phrase, sentence, or other communication is called ambiguous if it can be reasonably interpreted in more than one way. The simplest case is a single word with more than one sense: The word "bank", for example, can mean "financial institution", "ed | Amateur astronomyAmateur astronomy often called back yard astronomy is a hobby whose participants enjoy observing celestial objects. It is usually associated with viewing the night sky when most celestial objects and events are visible, but sometimes amateur astronomers a |
| American footballAmerican football known in the United States simply as football is a competitive team sport that rewards players' speed, agility, skill, tactics, and brute strength as they run and throw a ball, and block, tackle, and outrun each other, trying to force th | American Revolutionary WarThe American Revolutionary War ( 1775 1783), also known as the American War of Independence was a war fought between Great Britain and revolutionaries within thirteen of her North American colonies. The war, which eventually widened far beyond British Nor | AmpereIn physics, the ampere (symbol: A often informally abbreviated to amp is the SI base unit used to measure electrical currents. The present definition, adopted by the 9th CGPM in 1948 is: "one ampere is that constant current which, if maintained in two str |
| AmsterdamMunicipality of Amsterdam St Andrew's crosses are taken to represent these (though the crosses are even older than the motto). A popular tradition links the X's to the three threats to the city: Water, Fire and Pestilence. Alternate meanings: See Amsterda | Amhrán na bhFiannAmhran na bhFiann is the national anthem of the Republic of Ireland 1. It is also known by the English translation of its title, A Soldier's Song , as well as Amhran Naisiunta na hEireann the National Anthem of Ireland . The lyrics of the song are by Pead | American Civil WarThe American Civil War was fought in the United States from 1861 until 1865 between the northern states, popularly referred to as "the U. the Union," " the North," or "the Yankees"; and the seceding southern states, commonly referred to as "the Confederat |
| AmeriKKKa's Most Wanted | American Film Institute | Americium |
| Am | American shot | Ambient calculus |
| Amateur | Ambrose Bierce | Americas National Game |
| Amplitude modulation | Amber Diceless Roleplaying Game | American Sign Language |
| Amino acid | American | Ames, Iowa |
| Americans with Disabilities Act of 1990 | Amoeba | Ammonia |
| Amethyst | Ambrosia | Ambrose |
| Ambracia | Amber | Amalaric |
| Amos Bronson Alcott | Amazing Grace | America Online |
| Amino | Amine | Amide |
| American Stock Exchange | Amaranth | American Chinese cuisine |
| Amalasuntha | Amalric of Bena | Amara Sinha |
| Amaryllis | Amasis II | Amathus |
| Amati | Amazon | Amazons |
| Ambergris | Ambiorix | Amazon River |
| Ambrose the Camaldulian | Ambrosians | Ambrosiaster |
| Ambrosius Aurelianus | Ammon | Ammon (nation) |
| Ammonius Hermiae | Ammonius Saccas | Amos |
| Amphipolis | Amram | Amyntas I of Macedon |
| Amyntas III of Macedon | Ammianus Marcellinus | Amide hydrolysis |
| Amway | Amitabh Bachchan | Amalric |
| Amalric I of Jerusalem | Amalric II of Jerusalem | Ambrose the poet |
| American Red Cross | American English | American Airlines Flight 11 |
| American Airlines Flight 77 | Ambush | Ampicillin |
| American Civil Liberties Union | American Revolution | Amiga |
| American and British English differences | Amber Road | Amerigo Vespucci |
| Amstrad CPC 464 | Amphibious assault ship | American Media |
| Americanization | Amdahl's law | American Football League |
| American Airlines | AMD | American Quarter Horse |
| Amazonite | Ambrosius Bosschaert | Amphetamine |
| Amalthea | Amy Grant | Ames test |
| American Registry for Internet Numbers | Ammeter | Amanda Hesser |
| Amoxicillin | Amorphous solid | Amr Diab |
| AMOS BASIC | Amnesty International | Amputation |
| Ampallang piercing | Ambrose of Alexandria | Amphisbaena |