13-letter words containing r, u, t, a
- amphitrichous — having a single flagellum at each end.
- 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
- 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
- another-guess — of another kind.
- ante-christum — before Christ. Abbreviation: A.C.
- antenniferous — having antennae
- anthraquinone — a yellow crystalline solid used in the manufacture of dyes, esp anthraquinone dyes, which have excellent colour properties. Formula: C6H4(CO)2C6H4
- anti-burglary — the felony of breaking into and entering the house of another at night with intent to steal, extended by statute to cover the breaking into and entering of any of various buildings, by night or day.
- anti-cultural — of or relating to culture or cultivation.
- anti-european — opposed to the European Union or to political union of the countries of Europe
- anti-freudian — of or relating to Sigmund Freud or his doctrines, especially with respect to the causes and treatment of neurotic and psychopathic states, the interpretation of dreams, etc.
- anti-universe — a universe made up of antimatter, postulated to exist far out in space
- antiauthority — Opposed to authority.
- anticlinorium — a vast elongated anticline with its strata further folded into anticlines and synclines
- antidiuretics — Plural form of antidiuretic.
- antiguerrilla — acting against guerrilla activity
- antimarijuana — opposed to or acting against the use of marijuana
- antineutrinos — Plural form of antineutrino.
- antipruritics — Plural form of antipruritic.
- antiquitarian — an admirer of the practices of antiquity
- antireligious — opposed to religious ideas, beliefs, and organizations
- antirheumatic — acting against rheumatism
- antiritualism — opposed to ritualism
- antiscorbutic — preventing or curing scurvy
- antisubmarine — (of weapons, missiles, etc) designed to combat or destroy submarines
- antisudorific — an antiperspirant.
- apatosauruses — Plural form of apatosaur.
- aperture card — a punched-card mounting for microfilmed pages.
- aperture mask — a perforated metal plate situated behind the faceplate of a color television picture tube and having holes aligned to insure that each of three electron beams strikes only its corresponding red, green, or blue phosphor dot.
- aphanipterous — of or relating to the wingless insects of the order Aphaniptera
- appeals court — An appeals court is the same as an appellate court.
- appoggiaturas — Plural form of appoggiatura.
- appropinquate — to approach
- appropinquity — nearness
- appurtenances — accessories or equipment
- aquaculturist — a person who practises aquaculture
- arboriculture — the cultivation of trees or shrubs, esp for the production of timber
- archeptolemus — (in the Iliad) the son of Iphitus who served as a charioteer for Hector.
- architectural — Architectural means relating to the design and construction of buildings.
- architectured — Designed (according to a form of architecture, or as if by an architect).
- architectures — Plural form of architecture.
- argentiferous — containing or bearing silver
- argumentation — Argumentation is the process of arguing in an organized or logical way, for example in philosophy.
- argumentative — Someone who is argumentative is always ready to disagree or start quarrelling with other people.
- armamentarium — the items that comprise the material and equipment used by a physician in his professional practice
- armour-plated — An armour-plated vehicle or building has a hard metal covering in order to protect it from gunfire and other missiles.
- arseniuretted — combined with arsenic so as to form an arsenide.
- arteriovenous — of, relating to, or affecting an artery and a vein