17-letter words containing i, d, o, n, e, u
- indicial equation — an equation that is obtained from a given linear differential equation and that indicates whether a solution in power series form exists for the differential equation.
- indirect question — An indirect question is the same as a reported question.
- induction furnace — a type of electric furnace used for melting a charge of scrap by the heat produced by its own electrical resistance.
- induction heating — a method of heating a conducting material, as metal in a furnace, by using electromagnetic induction to establish a current in the material.
- institutionalised — to make institutional.
- institutionalized — to make institutional.
- integrated course — a course that covers several subjects
- intercommunicated — Simple past tense and past participle of intercommunicate.
- island of the sun — Sicily: the island where Helius kept his oxen.
- italian greyhound — one of an Italian breed of toy dogs resembling a greyhound.
- juazeiro do norte — a city in Bahia state, NE Brazil.
- judgment of paris — the decision by Paris to award Aphrodite the golden apple of discord competed for by Aphrodite, Athena, and Hera.
- juvenile offender — a child or young person who has been found guilty of some offence, act of vandalism, or antisocial behaviour before a juvenile court
- lago de nicaragua — Spanish name of Lake Nicaragua.
- 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.
- lick one's wounds — an injury, usually involving division of tissue or rupture of the integument or mucous membrane, due to external violence or some mechanical agency rather than disease.
- line of induction — (formerly) a line of force in a magnetic field.
- line of longitude — an imaginary line on a globe, map, etc, indicating longitude
- liquid propellant — a rocket propellant in liquid form.
- 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.
- 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
- memoised function — memo function
- memoized function — memo function
- methylidyne group — the trivalent group ≡CH.
- microencapsulated — Encapsulated using microencapsulation.
- microminiaturized — Simple past tense and past participle of microminiaturize.
- microreproduction — a photographic image too small to be read by the unaided eye.
- 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.
- multitudinousness — The state or condition of being multitudinous.
- 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.
- nonproductiveness — The quality of being nonproductive.
- northern studfish — See under studfish.
- not the full quid — mentally subnormal
- noun pre-modifier — a noun that occurs before and modifies another noun, as toy in toy store or tour in tour group.
- 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
- on the foundation — an endowment or legacy for the perpetual support of an institution such as a school or hospital
- order of business — a task assigned or to be dealt with: Our first order of business is to reduce expenses.
- out in left field — Baseball. the area of the outfield to the left of center field, as viewed from home plate. the position of the player covering this area.
- out of one's mind — (in a human or other conscious being) the element, part, substance, or process that reasons, thinks, feels, wills, perceives, judges, etc.: the processes of the human mind.
- out of the window — dispensed with; disregarded
- period-revolution — a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.