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19-letter words containing s, e, r, i, a

  • pyorrhea alveolaris — a chronic periodontitis of the gums and tooth sockets, characterized by the formation of pus and, usually, by loosening of the teeth
  • pyorrhea-alveolaris — Pathology. a discharge of pus.
  • pyrenees-orientales — a department in S France. 1600 sq. mi. (4145 sq. km). Capital: Perpignan.
  • quantum electronics — the application of quantum mechanics and quantum optics to the study and design of electronic devices
  • queen's regulations — (in Britain and certain other Commonwealth countries when the sovereign is female) the code of conduct for members of the armed forces
  • quick-change artist — a person adept at changing from one thing to another, as an entertainer who changes costumes quickly during a performance.
  • radius of curvature — the absolute value of the reciprocal of the curvature at a point on a curve.
  • raise one's hackles — one of the long, slender feathers on the neck or saddle of certain birds, as the domestic rooster, much used in making artificial flies for anglers.
  • 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.
  • recessional moraine — a moraine marking a temporary halt in the general retreat of a glacier.
  • recording secretary — an officer charged with keeping the minutes of meetings and responsible for the records.
  • reef whitetip shark — whitetip shark (def 1).
  • reflux oesophagitis — inflammation of the gullet caused by regurgitation of stomach acids, producing heartburn: may be associated with a hiatus hernia
  • refreshable display — braille display
  • 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.
  • register assignment — (compiler, algorithm)   The phase of a compiler that determines which register to use for each program value selected during register allocation.
  • registered disabled — on a local authority register under the Chronically Sick and Disabled Persons Act 1970
  • registration number — number on vehicle licence plate
  • regression analysis — Statistics. a procedure for determining a relationship between a dependent variable, as predicted success in college, and an independent variable, as a score on a scholastic aptitude test, for a given population. The relationship is expressed as an equation for a line (regres·sion·line) or curve (regres·sion·curve) in which any coefficient (regression coefficient) of the independent variable in the equation has been determined from a sample population.
  • regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
  • reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
  • 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.
  • relational database — an electronic database comprising multiple files of related information, usually stored in tables of rows (records) and columns (fields), and allowing a link to be established between separate files that have a matching field, as a column of invoice numbers, so that the two files can be queried simultaneously by the user.
  • releasing mechanism — a hypothetical control complex in the central nervous system of animals that triggers the appropriate behavioral response to a releaser.
  • 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.
  • removable hard disk — (storage)   A type of magnetic disk, or possibly magneto-optical disk which is not permanently attached to the disk drive (not a fixed disk) but which can be taken out and replaced, allowing many disks to be used in the same drive. The term "removable disk" would seem to be applicable to floppy disks but is generally reserved for hard disks in suitable cartridges such as those made by Syquest, Iomega and others. Removable disk packs were common on minicomputers such as the PDP-11 in use in the 1970s except that the drives were the size of washing machines and the disk packs as big as car wheels. Removable disks became popular on microcomputers in the 1990s as a cheap way of expanding disk space, transporting large amounts of data between computers and storing backups. Large, cheap fixed hard disks and USB memory sticks have made removable disks less attractive.
  • renaissance revival — a mid-Victorian architectural style adapting the classical forms of 15th- and 16th-century Italian architecture, especially palace architecture, usually characterized by blocklike massing, with refined classicized decorative detail around regularly organized windows.
  • repeat prescription — A repeat prescription is a prescription for a medicine that you have taken before or that you use regularly.
  • representationalism — Also called representative realism. Epistemology. the view that the objects of perception are ideas or sense data that represent external objects, especially the Lockean doctrine that the perceived idea represents exactly the primary qualities of the external object.
  • research fellowship — the position or office of someone who conducts academic research into a subject at a university, etc
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • residence insurance — Residence insurance is insurance coverage against damage to a building in which you live.
  • 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.
  • resonant-jet engine — resojet engine.
  • resorcinolphthalein — fluorescein.
  • respiratory failure — a condition in which the respiratory system is unable to provide an adequate supply of oxygen or to remove carbon dioxide efficiently
  • respiratory pigment — any of several colored protein substances, as hemoglobin and hemocyanin, in the circulatory system of animals and some plants, that combine reversibly with oxygen that is carried to the tissues
  • restorative justice — a theory and method in criminal justice in which it is arranged that the victim and the community receive restitution from the offender.
  • 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?”.
  • rhodesian ridgeback — a large short-haired breed of dog characterized by a ridge of hair growing along the back in the opposite direction to the rest of the coat. It was originally a hunting dog from South Africa
  • rickettsial disease — any of several acute infectious diseases caused by ticks, mites, or body lice infected with rickettsiae. The main types include typhus, spotted fever, Q fever, trench fever, and tsutsugamushi disease
  • ring-a-ring-a-roses — a children's game in which the players sing a song, at the end of which they all fall down
  • ring-spinning frame — a machine containing the ring, traveler, and bobbin used in spinning yarn.
  • rock-paper-scissors — a method of selecting, for example, which of two people perform a task: each person simultaneously makes one of three hand gestures representing a rock, a sheet of paper, and a pair of scissors respectively. Each gesture defeats one and is defeated by one of the other two: rock defeats scissors but is defeated by paper; paper defeats rock but is defeated by scissors. The person whose gesture defeats the other is selected
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