13-letter words containing a, u, t
- adventuristic — relating to adventurism
- adventurously — inclined or willing to engage in adventures; enjoying adventures.
- aeroacoustics — the study of the generation and transmittance of sound by fluid flow
- aerosinusitis — inflammation of the nasal sinuses caused by the effect on the sinuses of changes in atmospheric pressure.
- aerostructure — any separately manufactured unit, component, or section of an aircraft or other vehicle capable of flight
- afterthoughts — Plural form of afterthought.
- agglutinating — Present participle of agglutinate.
- agglutination — the act or process of agglutinating
- agglutinative — tending to join or capable of joining
- agglutinogens — Plural form of agglutinogen.
- agriculturist — an agricultural expert
- agro-industry — the large-scale production, processing, and packaging of food using modern equipment and methods.
- agrobacterium — A soil bacterium, of the genus Agrobacterium, which can fix nitrogen, and causes the formation of crown galls in plants.
- air pollution — contamination of the atmosphere
- air-lift pump — a pump that pumps liquid by injecting air into the lower end of an open pipe immersed in the liquid: often used in boreholes
- air-to-ground — operating between an aircraft in flight and a target on the ground
- airplane turn — a midair turn made in the middle of a jump.
- aius locutius — a disembodied voice that warned the Romans of a coming invasion by the Gauls.
- ajax mountain — a peak on the Idaho-Montana border, in the Bitterroot Range of the Rocky Mountains. 10,900 feet (3,324 meters).
- albertosaurus — A giant fierce carnivorous tyrannosaurus-like dinosaur, of gemus Albertosaurus, discovered in Alberta, Canada.
- albumen plate — a flexible zinc or aluminum printing plate coated with a photosensitive compound, used in offset printing of usually fewer than 50,000 copies.
- alfred austin — Alfred, 1835–1913, English poet: poet laureate 1896–1913.
- allochthonous — (of rocks, deposits, etc) found in a place other than where they or their constituents were formed
- allowable cut — the amount of a natural resource, as grain or oil, that may be harvested or taken from the earth within a specified period, as limited by law for conservation.
- allylthiourea — thiosinamine.
- alphabet soup — a confusing series of acronyms or abbreviations
- alpine tundra — a tundra that is treeless because of high elevation rather than high latitude.
- 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.
- 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
- alumosilicate — (inorganic chemistry) The anion [AlSiO4]-1.
- amarantaceous — amaranthine
- amateur night — an entertainment featuring amateur performers, often in competition for prizes.
- ambidexterous — ambidextrous
- ambient music — a style of popular music which aims to create a relaxing atmosphere
- 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.
- ammonium salt — any salt containing the NH 4 + ion, formed by the neutralization of ammonium hydroxide by an acid.
- amphiblastula — the free-swimming larva of certain sponges, which consists of a hollow spherical mass of cells some of which have flagella
- amphigastrium — any of the small leaves or appendages on the under surface of the stem of some liverworts
- amphithalamus — (in an ancient Greek house) a room adjoining the thalamus.
- amphitrichous — having a single flagellum at each end.
- amusement tax — a tax on various forms of entertainment, paid on admissions to theaters, etc.
- anak krakatau — a volcanic island in Indonesia formed by volcanic eruptions during and subsequent to 1927
- anfractuosity — the condition or quality of being anfractuous
- Ångstrom unit — a unit of length equal to 10 −10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometre
- announcements — Plural form of announcement.
- annual report — a report presented by the directors of a company to its shareholders each year, containing the profit-and-loss account, the balance sheet, and details of the past year's activity
- annunciations — Plural form of annunciation.