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19-letter words containing t, a, c, o, n, i

  • phakoemulsification — the removal of a cataract by first liquefying the affected lens with ultrasonic vibrations and then extracting it by suction.
  • phenylthiocarbamide — a crystalline, slightly water-soluble solid, C 6 H 5 NHCSNH 2 , that is either tasteless or bitter, depending upon the heredity of the taster, and is used in medical genetics and as a diagnostic.
  • photoreconnaissance — reconnaissance using aerial photography.
  • phthalocyanine blue — a pigment used in painting, derived from copper phthalocyanine and characterized chiefly by its brilliant, dark-blue color and by permanence.
  • piece of the action — the process or state of acting or of being active: The machine is not in action now.
  • pirates of penzance — an operetta (1879) by Sir William S. Gilbert and Sir Arthur Sullivan.
  • plastic deformation — In plastic deformation a material changes shape when a stress is applied to it and does not go back to its original state when the stress is removed.
  • pneumatic conveying — Pneumatic conveying is the movement of powdered or granulated solids using air.
  • pneumogastric nerve — the vagus nerve.
  • pocket-handkerchief — handkerchief (def 1).
  • poincare conjecture — Mathematics. the question of whether a compact, simply connected three-dimensional manifold is topologically equivalent to a three-dimensional sphere.
  • political scientist — A political scientist is someone who studies, writes, or lectures about political science.
  • political-scientist — a social science dealing with political institutions and with the principles and conduct of government.
  • polyclonal antibody — a mixture of antibodies of different specificities, as in the serum of a person immunized to various antigens.
  • population genetics — the branch of genetics concerned with the hereditary makeup of populations.
  • port jackson willow — an Australian acacia tree, Acacia cyanophylla, introduced in the 19th century into South Africa, where it is now regarded as a pest
  • post-and-rail fence — a fence constructed of upright wooden posts with horizontal timber slotted through it
  • postage and packing — the cost of packing and mailing an item bought by post
  • postsynchronization — the process of adding sound, such as dubbing, to a film or video after shooting or videotaping is completed
  • 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.
  • pseudo-intellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
  • psychotechnological — of or relating to psychotechnology
  • put one's back into — to devote all one's strength to (a task)
  • put sth into action — If you put an idea or policy into action, you begin to use it or cause it to operate.
  • quantum electronics — the application of quantum mechanics and quantum optics to the study and design of electronic devices
  • quick on the uptake — You say that someone is quick on the uptake when they understand things quickly. You say that someone is slow on the uptake when they have difficulty understanding simple or obvious things.
  • 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.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • 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.
  • 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
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