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17-letter words containing a, n, d, o, u, i

  • lame-duck session — (formerly) the December to March session of those members of the U.S. Congress who were defeated for reelection the previous November.
  • legendre equation — a differential equation of the form (1− x 2) d2y/dx2 − 2 xdy/dx + a (a + 1) y = 0, where a is an arbitrary constant.
  • liberal education — an education based primarily on the liberal arts, emphasizing the development of intellectual abilities as opposed to the acquisition of professional skills.
  • liquid propellant — a rocket propellant in liquid form.
  • long island sound — an arm of the Atlantic between Connecticut and Long Island. 90 miles (145 km) long.
  • longitudinal wave — a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.
  • magellanic clouds — either of two irregular galactic clusters in the southern heavens that are the nearest independent star system to the Milky Way.
  • manitoulin island — an island in N Lake Huron belonging to Canada. 80 miles (130 km) long.
  • many-valued logic — the study of logical systems in which the truth-values that a proposition may have are not restricted to two, representing only truth and falsity
  • microencapsulated — Encapsulated using microencapsulation.
  • microminiaturized — Simple past tense and past participle of microminiaturize.
  • modeling language — modelling language
  • mounted policeman — policemen who patrol on horseback
  • multi-directional — extending or operating in several directions at the same time; functioning or going in more than one direction: a multidirectional stereo speaker system.
  • nasolacrimal duct — a membranous canal extending from the lacrimal sac to the nasal cavity, through which tears are discharged into the nose.
  • natural deduction — (logic)   A set of rules expressing how valid proofs may be constructed in predicate logic. In the traditional notation, a horizontal line separates premises (above) from conclusions (below). Vertical ellipsis (dots) stand for a series of applications of the rules. "T" is the constant "true" and "F" is the constant "false" (sometimes written with a LaTeX \perp). "^" is the AND (conjunction) operator, "v" is the inclusive OR (disjunction) operator and "/" is NOT (negation or complement, normally written with a LaTeX \neg). P, Q, P1, P2, etc. stand for propositions such as "Socrates was a man". P[x] is a proposition possibly containing instances of the variable x, e.g. "x can fly". A proof (a sequence of applications of the rules) may be enclosed in a box. A boxed proof produces conclusions that are only valid given the assumptions made inside the box, however, the proof demonstrates certain relationships which are valid outside the box. For example, the box below labelled "Implication introduction" starts by assuming P, which need not be a true proposition so long as it can be used to derive Q. Truth introduction: - T (Truth is free). Binary AND introduction: ----------- | . | . | | . | . | | Q1 | Q2 | ----------- Q1 ^ Q2 (If we can derive both Q1 and Q2 then Q1^Q2 is true). N-ary AND introduction: ---------------- | . | .. | . | | . | .. | . | | Q1 | .. | Qn | ---------------- Q1^..^Qi^..^Qn Other n-ary rules follow the binary versions similarly. Quantified AND introduction: --------- | x . | | . | | Q[x] | --------- For all x . Q[x] (If we can prove Q for arbitrary x then Q is true for all x). Falsity elimination: F - Q (Falsity opens the floodgates). OR elimination: P1 v P2 ----------- | P1 | P2 | | . | . | | . | . | | Q | Q | ----------- Q (Given P1 v P2, if Q follows from both then Q is true). Exists elimination: Exists x . P[x] ----------- | x P[x] | | . | | . | | Q | ----------- Q (If Q follows from P[x] for arbitrary x and such an x exists then Q is true). OR introduction 1: P1 ------- P1 v P2 (If P1 is true then P1 OR anything is true). OR introduction 2: P2 ------- P1 v P2 (If P2 is true then anything OR P2 is true). Similar symmetries apply to ^ rules. Exists introduction: P[a] ------------- Exists x.P[x] (If P is true for "a" then it is true for all x). AND elimination 1: P1 ^ P2 ------- P1 (If P1 and P2 are true then P1 is true). For all elimination: For all x . P[x] ---------------- P[a] (If P is true for all x then it is true for "a"). For all implication introduction: ----------- | x P[x] | | . | | . | | Q[x] | ----------- For all x . P[x] -> Q[x] (If Q follows from P for arbitrary x then Q follows from P for all x). Implication introduction: ----- | P | | . | | . | | Q | ----- P -> Q (If Q follows from P then P implies Q). NOT introduction: ----- | P | | . | | . | | F | ----- / P (If falsity follows from P then P is false). NOT-NOT: //P --- P (If it is not the case that P is not true then P is true). For all implies exists: P[a] For all x . P[x] -> Q[x] ------------------------------- Q[a] (If P is true for given "a" and P implies Q for all x then Q is true for a). Implication elimination, modus ponens: P P -> Q ---------- Q (If P and P implies Q then Q). NOT elimination, contradiction: P /P ------ F (If P is true and P is not true then false is true).
  • neurodegenerative — Resulting in or characterized by degeneration of the nervous system, especially the neurons in the brain.
  • newfoundland time — a form of civil time observed on the island of Newfoundland, one and one-half hours later than Eastern time and a half hour later than Atlantic time.
  • non-subordination — the act of placing in a lower rank or position: The refusal to allow women to be educated was part of society's subordination of women to men.
  • nuclear radiation — Physics. radiation in the form of elementary particles emitted by an atomic nucleus, as alpha rays or gamma rays, produced by decay of radioactive substances or by nuclear fission.
  • nursery education — education provided at a school for young children, usually from three to five years old
  • odds-on favourite — a person, team, horse, etc that is regarded as the most likely to win a competition
  • odour of sanctity — sanctimoniousness
  • old south arabian — a group of four closely related Semitic languages, having a writing system and used from about the eighth to the fifth centuries b.c. in the southern part of Arabia.
  • on the foundation — an endowment or legacy for the perpetual support of an institution such as a school or hospital
  • phumiphon aduldet — (Phumiphon Aduldet; Bhumibol Adulyadej) born 1927, king of Thailand since 1946.
  • postural drainage — a therapy for clearing congested lungs by placing the patient in a position for drainage by gravity, often accompanied by percussion with hollowed hands.
  • potassium cyanide — a white, granular, water-soluble, poisonous powder, KCN, having a faint almondlike odor, used chiefly in metallurgy and photography.
  • primary education — junior, elementary schooling
  • private education — education provided by a private individual or organization, rather than by the state or a public body
  • production values — the quality of a media production (such as a film) in regards to elements such as colours, quality, style, etc
  • programming fluid — (jargon)   (Or "wirewater") Coffee, unleaded coffee (decaffeinated), Cola, or any caffeinacious stimulant. Many hackers consider these essential for those all-night hacking runs.
  • prusso-danish war — a war of 1864 between Prussia and Denmark by which Denmark lost Schleswig-Holstein.
  • pseudo-humanistic — a person having a strong interest in or concern for human welfare, values, and dignity.
  • psychoeducational — designating or of psychological methods, as intelligence tests, used in evaluating learning ability
  • pull your head in — be quiet!
  • put in a word for — to make favourable mention of (someone); recommend
  • pyroligneous acid — a yellowish, acidic, water-soluble liquid, containing about 10 percent acetic acid, obtained by the destructive distillation of wood: used for smoking meats.
  • quantity discount — When you receive a quantity discount from a store or supplier, you pay less because you have bought a large quantity of goods. Also known as bulk buying discount.
  • quattuordecillion — a cardinal number represented in the U.S. by 1 followed by 45 zeros, and in Great Britain by 1 followed by 84 zeros.
  • quick on the draw — having fast reflexes
  • radioluminescence — luminescence induced by nuclear radiation.
  • recreation ground — an open space for public recreation, esp one in a town, with swings and slides, etc, for children
  • recreational drug — drug taken for pleasure
  • reduction formula — a formula, such as sin (90° ± A) = cos A, expressing the values of a trigonometric function of any angle greater than 90° in terms of a function of an acute angle
  • rhodope mountains — a mountain range in SE Europe, in the Balkan Peninsula extending along the border between Bulgaria and Greece. Highest peak: Golyam Perelik (Bulgaria), 2191 m (7188 ft)
  • rio grande do sul — a state in S Brazil. 107,923 sq. mi. (279,520 sq. km). Capital: Pôrto Alegre.
  • road construction — the building of roads
  • road-fund licence — a licence showing that the tax payable in respect of a motor vehicle has been paid
  • russian wolfhound — borzoi.
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