| Aberration | Aberration of light | Aberration in optical systems |
| Aberdeen, South DakotaAberdeen a city and the county seat of Brown County, South Dakota, U. about 125 m. of Pierre. 1890) 3182; ( 1900) 4087, of whom 889 were foreign-born; ( 1905) 5841; ( 1910) 10,753. As of the 2000 census, the city had a total population of 24,658. In 1911, | AberdourAberdour is a village in Fife, Scotland. Pleasantly situated on the shore of the Firth of Forth, 17 1/2 m. of Edinburgh by the North British railway and 7 m. of Leith by steamer, it is much resorted to for its excellent sea-bathing. There are ruins of a c | AberfoyleThere is also Aberfoyle, Ontario. Aberfoyle is a village in the region of Stirling, Scotland, 27 miles northwest of Glasgow. The population stands at 635 as of the 1998 census. The town is situated at the base of Craigmore (1271 foot high) and on the Lagg |
| AbergavennyAbergavenny ( Welsh: Y Fenni is a market town and municipal borough in Monmouthshire, in Wales. It is 14 miles west of Monmouth. It is situated at the junction of a small stream called the Gavenny with the River Usk; and the site, almost surrounded by lof | AbersychanAbersychan is an urban district in Wales, in the northern parliamentary division of Torfaen near to Newport. It lies in the narrow upper valley of the Afon Lwyd on the eastern edge of the great coal and iron mining district of Glamorganshire and Monmouths | AbertilleryAbertillery ( Welsh Abertyleri is an urban district in the county of Monmouthshire, Wales, 16 miles north-west of Newport, originally on the Great Western Railway. Its population rose steeply during the period of mining development in the Rhondda valleys, |
| AberystwythAberystwyth (from the Welsh Mouth of the Ystwyth is a historic market town, administrative centre, and seaport of Ceredigion, Wales. It is situated near the confluence of the rivers Ystwyth and Rheidol, about mid way down the length of Cardigan Bay. Abery | AbettorAbettor (from to abet O. abeter a and beter to bait, urge dogs upon any one; this word is probably of Scandinavian origin, meaning to cause to bite), is a law term implying one who instigates, encourages or assists another to commit an offence. An abettor | AbeyanceAbeyance (from the Old French abeance meaning "gaping"), a state of expectancy in respect of property, titles or office, when the right to them is not vested in any one person, but awaits the appearance or determination of the true owner. In law, the term |
| Abiogenesis | Aberfan disaster | Abhidhamma |
| Abhorrers | Abiathar | Abigail |
| AbiWord | Abandonware | Abingdon |
| Abipones | Abjuration | Abkhazia |
| Abitibi | Abraham Joshua Heschel | Aberdeen Bestiary |
| Abstraction | Abelian group | Abracadabra |
| Abdul-Baha | Abednego | Abulparaj |
| Abner Duck | Absinthe | Abu Zubaydah |
| Aberrant (role-playing game) | Absolute Infinite | Abbey of St. Gall |
| Abyssinian (cat) | About.com | Abolitionism |
| Absolute gain | Abstract factory pattern | Absolute pitch |
| Abessive case | Absolutive case | Abalone game |
| Abendana | Abelian category | Abraham Robinson |
| Abbie Hoffman | Abbasid | Abbadid |
| Abenaki | Abidjan | Abuja |
| Absolutely Fabulous | Abraham de Moivre | Abrahamic religion |
| Abyss | Abacus logic | Abyssinian Church |
| Abbreviated Test Language for Avionics Systems | ABC ALGOL | ABCL/1 |
| ABCL/c plus | ABCL/R | ABCL/R2 |
| Abductive reasoning | ABEND | ABI |
| Abort (computing) | ABP | Abscissa |
| Abstract interpretation | Abstraction (computer science) | Abstract machine |
| Abu Qir | Abu-Bakr Muhammad ben Yahya as-Suli | Abdul Kalam |
| Abdel-Razak al-Yehiyeh | Abraham Simpson | Abbotsford Saints |
| Abd Allah ibn Zubayr | Abdominal cavity | Absolute monarchy |
| Above the Law (film) | Abbott and Costello Meet Frankenstein | Abetalipoproteinemia |
| Abarim | Abba | Abda (biblical) |
| Abdon | Abel-beth-maachah | Abel-meholah |
| Abel-mizraim | Abel-shittim | Abez |
| Abi-albon | Abia | Abiasaph |
| Abib | Abida | Abieezer |
