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19-letter words containing a, n, t, r, c

  • posttranscriptional — Genetics, Biochemistry. occurring after the formation of RNA from DNA but before the RNA strand leaves the nucleus.
  • potassium carbonate — a white, granular, water-soluble powder, K 2 CO 3 , used chiefly in the manufacture of soap, glass, and potassium salts.
  • preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
  • prescription charge — a charge, set by the government, to be paid by a patient for medicines
  • presumption of fact — a presumption based on experience or knowledge of the relationship between a known fact and a fact inferred from it.
  • primary containment — Primary containment is the main means of preventing leaks and spills using equipment in direct content with the oil or gas being stored or transported.
  • private prosecution — a prosecution started by a private individual rather than by the police
  • production platform — offshore power station
  • propositional logic — (logic)   (or "propositional calculus") A system of symbolic logic using symbols to stand for whole propositions and logical connectives. Propositional logic only considers whether a proposition is true or false. In contrast to predicate logic, it does not consider the internal structure of propositions.
  • proton-proton chain — a series of thermonuclear reactions, responsible for the energy production in stars like the sun, in which the nuclei of hydrogen atoms are transformed into helium nuclei by sequential addition of single hydrogen nuclei.
  • pseudo-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
  • public-interest law — a branch of law that often utilizes class-action suits to protect the interest of a large group or of the public at large, as in matters relating to racial discrimination, air pollution, etc.
  • puncture repair kit — set of tools for patching a bicycle tyre
  • quantum electronics — the application of quantum mechanics and quantum optics to the study and design of electronic devices
  • quick-change artist — a person adept at changing from one thing to another, as an entertainer who changes costumes quickly during a performance.
  • radiational cooling — the cooling of the earth's surface and adjacent air, primarily at night, caused by a loss of heat due to surface emission of infrared radiation.
  • rap on the knuckles — a mild reprimand or light sentence
  • rayleigh scattering — the scattering of light by particles that are very small in relation to the wavelength of the light, and in which the intensity of the scattered light varies inversely with the fourth power of the wavelength.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • rebus sic stantibus — (of the duration of the binding force treaty) for as long as the relevant facts and circumstances remain basically the same.
  • reconceptualization — to form into a concept; make a concept of.
  • recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
  • recurrence relation — (mathematics)   An equation that defines each element of a sequence in terms of one or more earlier elements. E.g. The Fibonacci sequence, X[1] = 1 X[2] = 1 X[n] = X[n-1] + X[n-2] Some recurrence relations can be converted to "closed form" where X[n] is defined purely in terms of n, without reference to earlier elements.
  • redress the balance — to make a fair adjustment; see that justice is done
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • register allocation — (compiler, algorithm)   The phase of a compiler that determines which values will be placed in registers. Register allocation may be combined with register assignment. This problem can be shown to be isomorphic to graph colouring by relating values to nodes in the graph and registers to colours. Values (nodes) which must be valid simultaneously are linked by edges and cannot be stored in the same register (coloured the same). See also register dancing and register spilling.
  • relational calculus — (database)   An operational methodolgy, founded on predicate calculus, dealing with descripitive expressions that are equivalent to the operations of relational algebra. Codd's reduction algorithm can convert from relational calculus to relational algebra. Two forms of the relational calculus exist: the tuple calculus and the domain calculus.
  • relative complement — the set of elements contained in a given set that are not elements of another specified set.
  • religious education — religion as school subject
  • relocation expenses — Relocation expenses are a sum of money that a company pays to someone who moves to a new area in order to work for the company. The money is to help them pay for moving house.
  • repeat prescription — A repeat prescription is a prescription for a medicine that you have taken before or that you use regularly.
  • republic of vietnam — the name (from 1955–75) for South Vietnam, as an independent republic, following the division of the country in 1954 into North Vietnam and South Vietnam
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • resistance movement — a movement fighting (for freedom, etc), often secretly or illegally, against an invader in an occupied country or against the country's government, etc
  • resistance training — physical training that utilizes isometric, isotonic, or isokinetic exercise to strengthen or develop the muscles.
  • resonance radiation — radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule.
  • resorcinolphthalein — fluorescein.
  • reticular formation — a network of neurons in the brainstem involved in consciousness, regulation of breathing, the transmission of sensory stimuli to higher brain centers, and the constantly shifting muscular activity that supports the body against gravity.
  • reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
  • revenue enhancement — a new tax or a tax increase.
  • reversible reaction — a reaction that, depending on ambient conditions, can proceed in either of two directions: the production of the reaction products from the reactants, or the production of the original reactants from the formed reaction products. Compare equilibrium (def 4).
  • rhetorical question — a question asked solely to produce an effect or to make an assertion and not to elicit a reply, as “What is so rare as a day in June?”.
  • rhythmic gymnastics — a form of gymnastics involving movements using hand apparatus such as balls, hoops, and ribbons
  • right circular cone — a cone whose surface is generated by lines joining a fixed point to the points of a circle, the fixed point lying on a perpendicular through the center of the circle.
  • ring up the curtain — to begin a theatrical performance
  • rocky mountain goat — a long-haired, white, antelopelike wild goat, Oreamnos americanus, of mountainous regions of western North America, having short, black horns.
  • royal correspondent — a journalist who reports on matters relating to royalty
  • sacramento sturgeon — white sturgeon.
  • saint patrick's day — March 17, observed by the Irish in honor of St. Patrick, the patron saint of Ireland.
  • san juan capistrano — a city in SW California: site of old Spanish mission; known for annual return of swallows, said to occur on March 19.
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