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17-letter words containing a, f, o, r, t, i

  • quadratic formula — the formula for determining theroots of a quadratic equation from its coefficients: .
  • rational function — a function that can be written as the quotient of two polynomials with integral coefficients.
  • 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
  • reflection nebula — a cloud of interstellar gas and dust that reflects the light of neighboring stars.
  • refractory period — a short period after a nerve or muscle cell fires during which the cell cannot respond to additional stimulation.
  • return of capital — A return of capital is a situation in which you receive back money that was previously invested.
  • rheumatoid factor — an antibody that is found in the blood of many persons afflicted with rheumatoid arthritis and that reacts against globulins in the blood.
  • right off the bat — Sports. the wooden club used in certain games, as baseball and cricket, to strike the ball. a racket, especially one used in badminton or table tennis. a whip used by a jockey. the act of using a club or racket in a game. the right or turn to use a club or racket.
  • rock of gibraltar — a British crown colony comprising a fortress and seaport located on a narrow promontory near the S tip of Spain. 1.875 sq. mi. (5 sq. km).
  • rotation of crops — a system of rotating in a fixed order the kinds of crops, as grain or grass, grown in the same field, to maintain soil fertility
  • rush-hour traffic — the large number of vehicles that move along roads, travelling to or from work at the beginning and end of the working day
  • safety precaution — a precaution that is taken in order to ensure that something is safe and not dangerous
  • saint elmo's fire — corona discharge.
  • scarlet firethorn — a Eurasian evergreen, thorny shrub, Pyracantha coccinea, of the rose family, having white, hairy flower clusters and bright red berries.
  • self-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
  • self-confirmation — the act of confirming.
  • self-consecration — the act of setting oneself to a task or vocation without ordination by others or by a religious body.
  • self-conservation — the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights.
  • self-presentation — an act of presenting.
  • self-preservation — preservation of oneself from harm or destruction.
  • self-purification — a natural process of purifying, as the ability of a body of water to rid itself of pollutants.
  • self-renunciation — renunciation of one's own will, interests, etc.
  • significant other — Sociology. a person, as a parent or peer, who has great influence on one's behavior and self-esteem.
  • sister of charity — a member of one of several congregations of sisters founded in 1634 by St. Vincent de Paul.
  • software engineer — a person who writes computer programs
  • south farmingdale — a town on central Long Island, in SE New York.
  • south west africa — a former name of Namibia.
  • south-west africa — a former name of Namibia.
  • sports facilities — places and things for doing sports
  • standard function — a subprogram provided by a translator that carries out a task, for example the computation of a mathematical function, such as sine, square root, etc
  • stannous fluoride — a white, crystalline powder, SnF 2 , slightly soluble in water: used as a source of fluorine in the prevention of dental caries, especially as a toothpaste additive.
  • statue of liberty — a large copper statue, on Liberty Island, in New York harbor, depicting a woman holding a burning torch: designed by F. A. Bartholdi and presented to the U.S. by France; unveiled 1886.
  • stock certificate — a certificate evidencing ownership of one or more shares of stock in a corporation.
  • strait of otranto — a stretch of water between SE Italy and Albania, connecting the Adriatic Sea with the Ionian Sea; of strategic importance during World War I
  • sufficient reason — the principle that nothing happens by pure chance, but that an explanation must always be available
  • teaching software — computer software for use in providing online education
  • temple of artemis — the temple at Ephesus dedicated to Artemis.
  • terminal platform — (in the oil industry) an offshore platform from which oil or gas is pumped ashore through a pipeline
  • the bag of tricks — every device; everything
  • the carboniferous — the Carboniferous period or rock system
  • the confederation — the original 13 states of the United States of America constituted under the Articles of Confederation and superseded by the more formal union established in 1789
  • the morning after — the aftereffects of excess, esp a hangover
  • thermal diffusion — the separation of constituents, often isotopes, of a fluid under the influence of a temperature gradient.
  • thiosulfuric acid — an acid, H 2 S 2 O 3 , that may be regarded as sulfuric acid with one oxygen atom replaced by sulfur.
  • thuringian forest — a forested mountain region in central Germany: a resort area.
  • to play with fire — If you say that someone is playing with fire, you mean that they are doing something dangerous that may result in great harm for them and cause many problems.
  • to raise the roof — If a group of people inside a building raise the roof, they make a very loud noise, for example by singing or shouting.
  • traffic diversion — a special route arranged for traffic to follow when the normal route cannot be used
  • traffic policeman — a policeman controlling traffic, esp while stationed at an intersection, or enforcing traffic regulations
  • traffic violation — driving offence
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