13-letter words starting with a
- altered chord — a chord in which one or more notes are chromatically changed by the introduction of accidentals
- alternateness — The state or quality of being alternate.
- alternatingly — to interchange repeatedly and regularly with one another in time or place; rotate (usually followed by with): Day alternates with night.
- alternatively — You use alternatively to introduce a suggestion or to mention something different to what has just been stated.
- alternativism — The rejection of a social normality through the pursuit of alternatives.
- alternativity — A characteristic of something having alternative connotations, akin to the representation of choice between two or more possibilities.
- althorp house — a mansion in Northamptonshire: seat of the Earls Spencer since 1508; originally a medieval house; altered (1787) to its present neoclassical style by Henry Holland. Diana, Princess of Wales is buried on Round Oval Island in the centre of the ornamental lake in Althorp Park
- altitude dial — an adjustable sundial utilizing the altitude of the sun, at a given latitude and time of year, as a means of telling the time.
- aluminiferous — containing or yielding aluminium or alumina
- aluminography — algraphy.
- aluminothermy — a process for reducing metallic oxides using finely divided aluminium powder. The mixture of aluminium and the oxide is ignited, causing the aluminium to be oxidized and the metal oxide to be reduced to the metal
- aluminum book — (publication) Due to a technical screwup some printings of the second edition are actually what the author calls "yucky green". See also book titles.
- aluminum foil — silver paper
- aluminum soap — any of the salts formed by higher carboxylic acids and aluminum, as aluminum oleate, aluminum palmitate, and aluminum stearate.
- alumosilicate — (inorganic chemistry) The anion [AlSiO4]-1.
- alveolar arch — the part of the upper or lower jawbone in which the teeth are set.
- alymphoplasia — (medicine) aplasia of the lymphoid tissue.
- amakrokokroko — a nickname for the South African Paralympic team
- amakwerekwere — a term used by Black people to refer to foreign Africans
- amalgamations — Plural form of amalgamation.
- amarantaceous — amaranthine
- amateur night — an entertainment featuring amateur performers, often in competition for prizes.
- amazon parrot — any of several tropical American green parrots of the genus Amazona, popular as pets.
- ambassadorial — Ambassadorial means belonging or relating to an ambassador.
- amber gambler — a driver who races through traffic lights when they are at amber
- ambidexterity — ambidextrous ease, skill, or facility.
- ambidexterous — ambidextrous
- ambient music — a style of popular music which aims to create a relaxing atmosphere
- ambient noise — the level of the total noise in an area
- ambiguousness — open to or having several possible meanings or interpretations; equivocal: an ambiguous answer.
- ambimoustrous — able to use a computer mouse proficiently with either hand
- ambisexuality — the state of being ambisexual
- ambitiousness — having ambition; eagerly desirous of achieving or obtaining success, power, wealth, a specific goal, etc.: ambitious students.
- ambrette seed — the seed of the abelmosk.
- ambroise pare — Ambroise [ahn-brwaz] /ɑ̃ˈbrwaz/ (Show IPA), 1510–90, French surgeon.
- amenhotep iii — Greek name Amenophis. ?1411–?1375 bc, Egyptian pharaoh who expanded Egypt's influence by peaceful diplomacy and erected many famous buildings
- america's cup — an international yachting trophy, first won by the schooner America in 1851 and held as a challenge trophy by the New York Yacht Club until 1983
- american aloe — century plant
- american bond — a brickwork bond having a course of headers between five or six courses of stretchers.
- american curl — a breed of slender cat with curled-back ears and a plumed tail
- american fork — a town in central Utah.
- american plan — a hotel rate in which the charge includes meals
- american wake — an all-night farewell party for a person about to emigrate to America
- amesha spenta — any of the personified attributes of Ahura Mazda.
- amicus curiae — a person not directly engaged in a case who advises the court
- amino radical — the univalent group, −NH 2 .
- aminoaciduria — the presence of amino acids in urine
- aminobenzoate — (organic chemistry) Any salt or ester of aminobenzoic acid.
- aminophylline — a derivative of theophylline that relaxes smooth muscle and is used mainly to dilate the airways in the treatment of asthma and emphysema
- aminothiazole — (chemistry) A heterocyclic amine, the starting point for synthesis of many compounds, sometimes used as a thyroid inhibitor in the treatment of hyperthyroidism.