| Achilles | Academy Award | Accessible computing |
| Acid | Actinopterygii | Actor |
| ActiniumActinium is a chemical element in the periodic table that has the symbol Ac and atomic number 89. Notable characteristics Actinium is a silvery radioactive metallic element. Due to its intense radioactivity, Actinium glows in the dark with an eerie blue l | Acute disseminated encephalomyelitisAcute disseminated encephalomyelitis ADEM is an immune mediated disease of brain. It usually occurs following a viral infection or vaccination, but it may also appear spontaneously. There are multiple inflammatory cell deposits in the brain, particularly | Achill IslandAchill Island in County Mayo is the largest island off the Irish mainland, and is situated off the west coast. Achill is attached to the mainland by a bridge between the villages of Achill Sound and Achill, so it is possible to drive onto the island. |
| AccordionAn accordion is a small portable free-reed wind instrument with a keyboard, the smallest representative of the organ family. Sound is made by a thin metal ribbon, a reed, that is held at one end and free at the other, like a ruler on the edge of a table t | AcousticsAcoustics is a branch of physics and is study of sound, mechanical waves in gases, liquids, and solids. A scientist who works in the field of acoustics is an acoustician . The application of acoustics in technology is called acoustical engineering. There | ActaeonIn Greek mythology, Actaeon or Aktaion was a son of Aristaeus and Autonoe in Boeotia, a hunter who endured the wrath of Diana. Diana was bathing nude in the woods near Boeotian Orchomenos when the hunter Actaeon stumbled across her. He stopped and stared, |
| Acoustic theoryFluid dynamics Acoustic theory is the field relating to mathematical description of sound waves. It is derived from fluid dynamics. See acoustics for the engineering approach. The propagation of sound waves in air can be modeled by an equation of motion ( | Active recallActive recall is a principle of efficient learning, which says that we need to actively stimulate memory in the learning process. It is an opposite to passive review in which the learning material is processed passively (e. by reading, watching, etc. | Acacia1,300; See List of Acacia species Acacia is a genus of shrubs and trees of Gondwanian origin belonging to the subfamily Mimosoideae of the Pea Family Fabaceae, first described from Africa by Linnaeus in 1773. There are roughly 1300 species worldwide: abou |
| Acapulco | Acropolis | Acupuncture |
| Acetylene | Acre | Actium |
| Acquire | Acetone | Actinophryid |
| Achaeans | Acting | Act of Settlement 1701 |
| Acropolis, Athens | Acorn Electron | Acts of the Apostles |
| Academic elitism | Accidental properties | Acadia University |
| Acoustic guitar | Activism | Accusative case |
| Actinide | ACN | Accelerated Graphics Port |
| Acceleration | Action Against Hunger | Acantharea |
| Accountancy | Acquis | ACE inhibitor |
| Active Directory | Acrylic paint | Active Server Pages |
| Ackermann function | Act of Union 1707 | Acid-base reaction theories |
| Accrington | Accumulator | AC-130 gunship |
| ACF Fiorentina | Achduart | Achiltibuie |
| Acceptance test | Acid rain | Acephalous |
| Acephali | Ace-to-six low | Ace-to-five low |
| Activision | Activation energy | Accelerating universe |
| Academy of Motion Picture Arts and Sciences | Acetic acid bacteria | Accidental |
| Access | Access charge | Access control |
| Access denial | Access failure | Access time |
| Acknowledgement | Acoustic coupler | Acquisition |
| Active laser medium | Accrual bond | Accuracy and precision |
| Acupressure | Accusative | Acetic acid |
| Acanthocephala | Actuary | Action movie |
| Acadian | Academy Award for Short Film - Novelty | Academy Award for Best Title Writing |
| Academy Award for Best Short Film - Live Action - 2 Reels | Academy Award for Best Dance Direction | Academy Award for Best Assistant Director |
| Academy Award for Best Short Film - Color | ACIS | Accuracy in Media |
| Academy Award for Best Story | Action | Acme |
| Acetylcholine | Acerola | Academia operosorum Labacensis |
| Academy Award for Best Actor | Act Prohibiting Importation of Slaves | Acrochordon |
| Acrylamide | Acorn Computers Ltd | Achondroplasia |
| Accra | Acton | Acidity constant |
| Acridine | Aconitum | Aconitine |
| Accounting scandals of 2002 | Acorn RISC Machine | ACID |
| Acoustic | Access control list | Academy Award for Best Picture |