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16-letter words containing a, n, e, c

  • projective plane — (mathematics)   The space of equivalence classes of vectors under non-zero scalar multiplication. Elements are sets of the form {kv: k != 0, k scalar, v != O, v a vector} where O is the origin. v is a representative member of this equivalence class. The projective plane of a vector space is the collection of its 1-dimensional subspaces. The properties of the vector space induce a topology and notions of smoothness on the projective plane. A projective plane is in no meaningful sense a plane and would therefore be (but isn't) better described as a "projective space".
  • prolonged-action — sustained-release.
  • promotional code — A promotional code is a code offered by retailers to customers who can use it to receive a discounted price when buying products online.
  • property company — a business that makes money by buying, selling, and renting out land and houses
  • prosecution case — the case brought against someone by a legal authority
  • protection ratio — the minimum acceptable ratio between the amplitudes of a wanted radio or television broadcast signal and any interfering signal
  • protestant ethic — work ethic.
  • proxima centauri — the nearest star to the sun at a distance of 4.3 light-years, part of the Alpha Centauri triple-star system located in the constellation Centaurus.
  • pseudocopulation — pollination of plants, esp orchids, by male insects while attempting to mate with flowers that resemble the female insect
  • pseudoparenchyma — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
  • psychic distance — the degree of emotional detachment maintained toward a person, group of people, event, etc.
  • public relations — (used with a plural verb) the actions of a corporation, store, government, individual, etc., in promoting goodwill between itself and the public, the community, employees, customers, etc.
  • publication date — the date on which a book or periodical is or is planned to be published.
  • publicity agency — an advertising agency; a firm that gets publicity for people or products
  • puddling-furnace — the act of a person or thing that puddles.
  • pull a long face — to look sad, glum, disapproving, etc.
  • purchasing agent — a person who buys materials, supplies, equipment, etc., for a company.
  • purchasing power — Also called buying power. the ability to purchase goods and services.
  • pygmy chimpanzee — a small chimpanzee, Pan paniscus, primarily of swamp forests in the Democratic Republic of the Congo: a threatened species.
  • quadricentennial — of, relating to, or marking the completion of a period of four hundred years.
  • quantum computer — a computer that makes use of the quantum states of electrons or other particles to store and process information as quantum bits.
  • quasi-scientific — of or relating to science or the sciences: scientific studies.
  • quatercentennial — pertaining to or marking a period of 400 years.
  • queen's champion — a hereditary official at British coronations, representing the king (King's Champion) or the queen (Queen's Champion) who is being crowned, and having originally the function of challenging to mortal combat any person disputing the right of the new sovereign to rule.
  • question of fact — a question concerning the reality of an alleged event or circumstance in a trial by jury, usually determined by the jury.
  • racing certainty — a horse considered very likely or certain to win a race
  • rack one's brain — If you rack your brains, you try very hard to think of something.
  • radiant exitance — the ability of a surface to emit radiation expressed as the radiant flux emitted per unit area at a specified point on the surface
  • radio microphone — a microphone incorporating a radio transmitter so that the user can move around freely
  • radio-controlled — A radio-controlled device works by receiving radio signals which operate it.
  • rainbow seaperch — an embiotocid fish, Hypsurus caryi, living off the Pacific coast of North America, having red, orange, and blue stripes on the body.
  • rambunctiousness — difficult to control or handle; wildly boisterous: a rambunctious child.
  • ramsden eyepiece — an eyepiece consisting of two plano-convex crown-glass lenses of equal focal length, placed with the convex sides facing each other and with a separation between the lenses of about two-thirds of the focal length of each.
  • rate of exchange — exchange rate.
  • re-accreditation — to ascribe or attribute to (usually followed by with): He was accredited with having said it.
  • reaction chamber — the chamber in a rocket engine in which the reaction or combustion of fuel occurs
  • reaction turbine — a turbine driven by the reactive force of a fluid passing through the rotor blades.
  • rearguard action — an action fought by a rearguard
  • recapitalization — a revision of a corporation's capital structure by an exchange of securities.
  • receiver general — a public official in charge of the government's treasury.
  • reclassification — categorization in a different way
  • reconceptualized — to form into a concept; make a concept of.
  • recreational sex — sex for the purpose of pleasure rather than reproduction, without the commitment of a relationship
  • rectus abdominis — a long flat muscle that extends along the whole length of both sides of the abdomen. It flexes the vertebral column, particularly the lumbar portion; it also tenses the anterior abdominal wall and assists in compressing the abdominal contents
  • redundancy money — a sum of money given by an employer to an employee who has been made redundant: usually calculated on the basis of the employee's rate of pay and length of service
  • reflection plane — a plane through a crystal that divides the crystal into two halves that are mirror images of each other.
  • refracting angle — an angle formed by a ray which is refracted and which is perpendicular to the refracting surface
  • refractive index — index of refraction.
  • regional council — the governing body in certain countries of a particular region or administrative division
  • register dancing — Many older processor architectures suffer from a serious shortage of general-purpose registers. This is especially a problem for compiler-writers, because their generated code needs places to store temporaries for things like intermediate values in expression evaluation. Some designs with this problem, like the Intel 80x86, do have a handful of special-purpose registers that can be pressed into service, providing suitable care is taken to avoid unpleasant side effects on the state of the processor: while the special-purpose register is being used to hold an intermediate value, a delicate minuet is required in which the previous value of the register is saved and then restored just before the official function (and value) of the special-purpose register is again needed.
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