aa
IPA: eɪˈeɪ
Root Word: AA
noun
- A member of Alcoholics Anonymous.
- An AA battery (energy-storage device).
- (US, baseball) Double-A: the second-highest level of play in Minor League Baseball after Triple-A (AAA).
- (US, military) USPS military code of Armed Forces – Americas.
- (volcanology) A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe.
- Several waterways in Europe.
- A river in northern France, flowing 93 km from near Bourthes, Pas-de-Calais department into the North Sea near Gravelines, Nord department.
- A small river in the Netherlands, flowing 72 km from near Nederweert, Limburg into the Dieze at 's-Hertogenbosch, North Brabant.
- A tributary of the Möhne river in North Rhine-Westphalia, Germany, part of the Rhine basin.
- A tributary of the Nether river in North Rhine-Westphalia, Germany, part of the Weser basin.
- A tributary of the Werre river in North Rhine-Westphalia, Germany, part of the Weser basin.
- A village in Ida-Viru County, northern Estonia, on the Gulf of Finland.
- A surname from Norwegian.
- Initialism of affirmative action. [(uncountable) A set of policies or programs providing advantages for people of a group who are seen to have traditionally been the target of discrimination]
- Initialism of air armament.
- Initialism of air attaché.
- Initialism of aircraft apprentice.
- Initialism of aircraft artificer.
- (aviation) Initialism of absolute altitude. [(aviation) The vertical distance between the airplane and the surface below.]
- (military) Initialism of anti-aircraft. [(military) Anti-aircraft artillery.]
- (military) Initialism of avenue of approach.
- (military) Initialism of assembly area.
- Initialism of airman apprentice.
- Initialism of absolute alcohol. [(chemistry) Reasonably pure ethyl alcohol that contains at most 1% of water]
- (psychology) Initialism of achievement age. [(psychology) The level of an individual's educational development, as measured by a standardized test, expressed in terms of the chronological age of a normal person with the same degree of educational attainment.]
- Initialism of acting appointment.
- Initialism of adoption agency.
- Initialism of armament artificer.
- Initialism of athletic association.
- Initialism of author's alteration.
- Initialism of aviation annex.
- (optics) Initialism of angular aperture.
- (organic chemistry) Initialism of amino acid. [(organic chemistry) Any organic compound containing both an amino and a carboxylic acid functional group.]
- (organic chemistry) Initialism of aminoacyl. [(organic chemistry) Any of class of organic radicals, formed by the removal of a hydroxyl group from an amino acid.]
- (organic chemistry) Initialism of acetic acid. [(organic chemistry) A clear colourless organic acid, CH₃COOH, formed by the bacterial oxidation of ethanol through acetic fermentation; it is used as a solvent and has very many industrial applications; it is the major acidic component of vinegar.]
- (organic chemistry) Initialism of acrylic acid. [(organic chemistry) A colourless liquid unsaturated organic acid, CH₂=CHCOOH; used as a monomer in the production of acrylic resins; forms acrylate esters by combination with alcohols.]
- (organic chemistry, medicine) Initialism of amyloid A.
- (organic chemistry) Initialism of arachidonic acid. [(organic chemistry) A long-chain polyunsaturated fatty acid, having 20 carbon atoms and four double bonds, found in animal fats; it is essential for human nutrition, being a precursor to the production of prostaglandins.]
- (organic chemistry) Initialism of ascorbic acid. [(biochemistry) A white crystalline organic compound, C₆H₈O₆, found in citrus fruits and many vegetables; it is an antioxidant and an efficient scavenger of free radicals.]
- (organic chemistry) Initialism of asymmetric aminohydroxylation.
- (biochemistry) Initialism of acetaldehyde adduct.
- (biochemistry) Initialism of adrenal androgen.
- (biochemistry, medicine) Initialism of antiandrogen. [(biochemistry, pharmacology) Any substance that inhibits the release or the biological effects of an androgen.]
- (chemistry) Initialism of antioxidant activity.
- (chemistry) Initialism of atomic absorption.
- (chemistry, engineering) Initialism of activated alumina.
- (immunology) Initialism of anti-antibody.
- (anatomy) Initialism of ascending aorta.
- (anatomy) Initialism of abdominal aorta.
- (anatomy) Initialism of aortic arch. [(anatomy) The curving portion of the aorta that bends between the ascending aorta and the descending aorta, from which the brachiocephalic artery, left carotid artery, and left subclavian artery arise.]
- (pathology) Initialism of acute appendicitis.
- (pathology) Initialism of allergic asthma.
- (pathology) Initialism of alopecia areata. [(medicine, dermatology) A form of alopecia in which hair is lost from various areas of the body.]
- (pathology) Initialism of anaplastic astrocytoma.
- (medicine) Initialism of anastomotic aneurysm.
- (pathology) Initialism of aortic aneurysm.
- (pathology) Initialism of aplastic anemia. [(pathology, hematology) A rare disease in which the bone marrow and the hematopoietic stem cells that reside there are damaged, causing pancytopenia.]
- (medicine) Initialism of arterial aneurysm.
- (medicine) Initialism of arytenoid adduction.
- (healthcare) Initialism of anesthesiologist assistant.
- (computer graphics) Initialism of antialiasing. [(computer graphics) any technique that reduces the appearance of jagged edges in digital images caused by high-contrast borders between pixels.]
- Initialism of African-American. [A black American.]
- Initialism of Asian-African.
- Initialism of Asian-American.
- (chiefly US, politics) Initialism of administrative assistant.
- Initialism of associate administrator.
- Initialism of assistant adjutant.
- Initialism of academic adviser.
- (education) Initialism of Associate in Arts or Associate of Arts.
- Initialism of appropriate authority.
- (British, law) Initialism of appropriate adult. [(UK, law) An adult, such as a parent, guardian, or social worker, whose role is to safeguard the interests of young people detained by the police, and who must be present at such interviews.]
- (finance) Initialism of account aggregator.
- (insurance) Initialism of appointed actuary.
- Initialism of approximate absolute.
- (statistics) Initialism of arithmetic average. [(statistics) The arithmetic mean.]
- (politics) Initialism of Association Agreement: a treaty between the European Union, its member states and a non-EU country that creates a framework for cooperation between them.
- (finance) Initialism of against actual.
- (Hong Kong) Initialism of agent assistant; an assistant of a real estate agent.
- (UK, pensions) Initialism of annual allowance.
- Initialism of Alcoholics Anonymous: a self-supporting organization of alcoholic people. [A self-supporting organization of alcoholic people, which proves mutual support to obtain and maintain sobriety.]
- Initialism of Academy Awards: a recognition of excellence in cinematic achievements, given annually by the Academy of Motion Picture Arts and Sciences. [The ceremony at which Academy Award winners are announced and receive their prizes.]
- Initialism of Addicts Anonymous.
- Initialism of Al Ain. [A city in the United Arab Emirates.]
- (aviation) Initialism of American Airlines: a major American airline headquartered in Fort Worth, Texas. [(poker slang) A pair of aces as a starting hand in Texas hold 'em.]
- (aviation) Initialism of Aerolíneas Argentinas.
- (aviation) Initialism of Ansett Australia or Ansett Airways.
- Initialism of Air Almanac, a publication.
- Initialism of American Anthropologist: the flagship journal of the American Anthropological Association, founded in 1888.
- Initialism of Acta Astronautica: a scientific journal founded in 1955, covering fields related to the peaceful scientific exploration of space.
- Initialism of Aluminum America, a corporation.
- Initialism of The Aluminum Association: a trade association for the aluminum production, fabrication and recycling industries.
- (US, historical, baseball) Initialism of American Association: an American minor league baseball league from 1902 to 1962 and 1969 to 1997.
- (UK, automotive) Initialism of The Automobile Association: a British motoring association founded in 1905.
- Initialism of Alzheimer's Association: an American volunteer health organization focusing on care, support and research for Alzheimer's disease.
- (US, historical) Initialism of Amalgamated Association of Iron and Steel Workers.
- (US, rail transport) Initialism of Ann Arbor Railroad.
- Initialism of Arlington Annex.
- Initialism of Army Act.
- (dated, Russia) Initialism of aviatsionnaya Armiya.
- (physics) Initialism of Antiproton Accumulator: an infrastructure connected to the Proton–Antiproton Collider at CERN.
- (occult) Alternative form of A∴A∴. [(occult) A Thelemic spiritual organization founded in 1907 by British occultists Aleister Crowley and George Cecil Jones.]
- Initialism of acetic acid. [(organic chemistry) A clear colourless organic acid, CH₃COOH, formed by the bacterial oxidation of ethanol through acetic fermentation; it is used as a solvent and has very many industrial applications; it is the major acidic component of vinegar.]
- Initialism of acting age.
- (medicine) Initialism of alveolar-arterial.
- Initialism of aminoacetone. [(chemistry) 1-amino-2-propanone, a secondary amino ketone]
- Initialism of amino acid. [(organic chemistry) Any organic compound containing both an amino and a carboxylic acid functional group.]
- Initialism of arachidonic acid. [(organic chemistry) A long-chain polyunsaturated fatty acid, having 20 carbon atoms and four double bonds, found in animal fats; it is essential for human nutrition, being a precursor to the production of prostaglandins.]
- Initialism of armature accelerator.
- Initialism of ascending aorta.
- Initialism of atomic absorption.
- Initialism of average audience.
- Abbreviation of adjectives.
- Abbreviation of arteries.
verb
- (computer graphics, transitive) To antialias.
adjective
- (military, aviation) Initialism of anti-aircraft or anti-air. [(military) Intended to attack aircraft.]
- (military, aviation) Initialism of air-to-air. [(aviation, of an act or action) With the participants being two or more aircraft in flight.]
- (anatomy, medicine) Initialism of atlantoaxial. [(anatomy) Of or pertaining to the articulation of the atlas with the axis.]
- (anatomy, medicine) Initialism of arterioarterial. [(medicine) Relating to, or communicating between two arteries.]
- (linguistics) Initialism of Afro-Asiatic.
- (linguistics) Initialism of Austroasiatic. [Of the Austroasiatic languages, a major language family spoken in parts of Southeast Asia, India and the Nicobar Islands.]
- Initialism of arctic-alpine.
- Initialism of always afloat.
- Abbreviation of ana (“of each, equal parts”).