18-letter words containing a, u, d, i, t, o

passing-out parade — a ceremonial parade of cadets who have completed their training
physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
pitch-and-run shot — chip shot.
point of departure — Nautical. the precise location of a vessel, established in order to set a course, especially in beginning a voyage in open water.
population density — ratio: inhabitants to area
population pyramid — a graph showing the distribution of a population by sex, age, etc.
potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
predation pressure — the effect of predation upon a population, resulting in the decrease in size of that population.
production company — an organization which produces, films, plays, television or radio programmes
production manager — a supervisor of the budget, crew and other details in the production of a film or play
protocol data unit — (PDU) A packet of data passed across a network. The term implies a specific layer of the OSI seven layer model and a specific protocol.
provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
pseudo-socialistic — of or relating to socialists or socialism.
pseudo-symptomatic — pertaining to a symptom or symptoms.
pseudoappendicitis — inflammation of the vermiform appendix.
pseudointellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
quadratic equation — an equation containing a single variable of degree 2. Its general form is ax 2 + bx + c = 0, where x is the variable and a, b, and c are constants (a ≠ 0).
quarry-tiled floor — a floor covered with square or diamond-shaped unglazed floor tiles
quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
radiation exposure — exposure to radiant energy or to the particles emitted in the transfer of radiant energy, esp the particles and gamma rays emitted in nuclear decay; exposure to radioactive substances
radiation pressure — the pressure exerted on a surface by electromagnetic radiation or by sound waves.
radiocommunication — communication by means of radio waves
radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
reduction strategy — (theory) An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
saturated solution — A saturated solution is a solution in which there is so much solute that if there was any more, it would not dissolve.
second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
secondary industry — manufacturing, services, etc.
small outline dimm — (storage) (SO-DIMM) A smaller kind of DIMM with 72 pins (supporting 32-bit transfers) or 144 pins (64-bit transfers). Regular DIMMs have 168 pins and support 64-bit transfers. Being roughly half the size of the regular DIMM, SO-DIMMs are often used in notebook computers.
sodium bicarbonate — a white, crystalline, water-soluble solid, in powder or granules, NaHCO 3 , usually prepared by the reaction of soda ash with carbon dioxide or obtained from the intermediate product of the Solvay process by purification: used chiefly in the manufacture of sodium salts, baking powder, and beverages, as a laboratory reagent, as a fire extinguisher, and in medicine as an antacid.
sodium tetraborate — borax1 .
sodium thiocyanate — a white powder or colorless, deliquescent crystals, NaSCN, used chiefly in organic synthesis and in medicine in the treatment of hypertension.
sodium thiosulfate — a white, crystalline, water-soluble powder, Na 2 S 2 O 3 ⋅5H 2 O, used as a bleach and in photography as a fixing agent.
solid-fuel heating — heating that uses solid fuel, such as coal or coke
southampton island — an island in N Canada, in the Northwest Territories at the entrance to Hudson Bay. 19,100 sq. mi. (49,470 sq. km).
southern rhodesian — a former name (until 1964) of Zimbabwe (def 1).
standoff insulator — a type of insulator that supports an electrical conductor at a distance from other elements or surfaces.
subordinate clause — a clause that modifies the principal clause or some part of it or that serves a noun function in the principal clause, as when she arrived in the sentence I was there when she arrived or that she has arrived in the sentence I doubt that she has arrived.
sun-dried tomatoes — tomatoes that have been dried or preserved by exposure to the sun
supraorbital ridge — browridge.
sutton-in-ashfield — a market town in N central England, in W Nottinghamshire. Pop: 41 951 (2001)
tertiary education — education, following secondary education at a school, at a college or university
theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
to find fault with — If you find fault with something or someone, you look for mistakes and complain about them.
to speak your mind — If you speak your mind, you say firmly and honestly what you think about a situation, even if this may offend or upset people.
tristan und isolde — a music drama (composed, 1857–59; première, 1865) by Richard Wagner.

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