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20-letter words containing f, a, r, i

  • most general unifier — (logic)   If U is the most general unifier of a set of expressions then any other unifier, V, can be expressed as V = UW, where W is another substitution. See also unification.
  • naturalistic fallacy — the supposed fallacy of inferring evaluative conclusions from purely factual premises
  • normal magnification — the magnification produced by a telescope or microscope such that the diameter of the exit pupil of the instrument is equal to the diameter of the pupil of the eye.
  • north atlantic drift — an ocean current flowing NE toward the British Isles, formed by the convergence of the Gulf Stream and the Labrador Current SE of Newfoundland.
  • northern leaf blight — a disease of corn caused by the fungus Exsherohilum turcicum, characterized by elongate tan-gray elliptical spots with subsequent blighting and necrosis of leaves.
  • norwegian forest cat — a breed of long-haired cat with a long bushy tail and a long mane
  • occupation franchise — the right of a tenant to vote in national and local elections
  • off-the-job training — training which is carried out away from your normal place of work
  • officer of the guard — an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbreviation: OG, O.G.
  • officer of the watch — the officer primarily responsible for the navigation of a ship, in the absence of the captain, during a certain watch.
  • official secrets act — law: legislation protecting state secret
  • olfactory anesthesia — absence or loss of the sense of smell.
  • on (or off) the air — that is (or is not) broadcasting or being broadcast
  • order bill of lading — a bill of lading that is issued to the order of a shipper or consignee for delivery of the goods and that can be transferred by endorsement to third parties.
  • paper qualifications — qualifications gained through official examinations, etc, rather than through experience
  • pappus of alexandria — 3rd century bc, Greek mathematician, whose eight-volume Synagoge is a valuable source of information about Greek mathematics
  • parallel of altitude — almucantar.
  • parallel of latitude — parallel (def 9).
  • parametric amplifier — a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit.
  • partial differential — an expression obtained from a given function of several variables by taking the partial derivative with respect to one of the variables and multiplying by the increment in that variable.
  • particulars of claim — (in England) the first reading made by the claimant in a county court action, showing the facts upon which he or she relies in support of a claim and the relief asked for
  • permonosulfuric acid — persulfuric acid (def 1).
  • potential difference — voltage
  • power of appointment — the authority granted by a donor to a donee to select the person or persons who are to enjoy property rights or income upon the death of the donor or of the donee or after the termination of existing rights or interests.
  • prefecture apostolic — a territory in the early stage of missionary development.
  • prima facie evidence — evidence sufficient to establish a fact or to raise a presumption of fact unless rebutted.
  • prima-facie evidence — evidence that is sufficient to establish a fact or to raise a presumption of the truth of a fact unless controverted
  • probability function — the function the values of which are probabilities of the distinct outcomes of a discrete random variable
  • quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
  • queen of the prairie — a tall plant, Filipendula rubra, of the rose family, having branching clusters of pink flowers, growing in meadows and prairies.
  • radio interferometer — any of several different types of instrumentation designed to observe interference patterns of electromagnetic radiation at radio wavelengths: used in the discovery and measurement of radio sources in the atmosphere.
  • rapid reaction force — a force that can be deployed swiftly to a site of conflict or potential conflict
  • recuperative furnace — a furnace having its incoming air heated by exhaust gases, the passage of air and gases through the furnace being always in the same direction.
  • refracting telescope — an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens set into one end of a tube and an adjustable eyepiece or combination of lenses set into the other end of a tube that slides into the first and through which the enlarged object is viewed directly; the other form (reflecting telescope) has a concave mirror that gathers light from the object and focuses it into an adjustable eyepiece or combination of lenses through which the reflection of the object is enlarged and viewed. Compare radio telescope.
  • refrigerator-freezer — a large appliance housing one compartment for refrigerating food and another for freezing.
  • refuse disposal unit — a unit or part of a sink that disposes of waste food, etc, by grinding
  • regenerative furnace — a furnace in which the incoming air is heated by regenerators.
  • republic of maldives — a republic occupying an archipelago of 1087 coral islands in the Indian Ocean, southwest of Sri Lanka: came under British protection in 1887; became independent in 1965 and a republic in 1968; member of the Commonwealth (1982–2016). The economy and infrastructure were severely damaged in the Indian Ocean tsunami of December 2004. Official language: Divehi. Official religion: (Sunni) Muslim. Currency: rufiyaa. Capital: Malé. Pop: 393 988 (2013 est). Area: 298 sq km (115 sq miles)
  • restriction fragment — a length of DNA cut from the strand by a restriction enzyme.
  • return of the native — a novel (1878) by Thomas Hardy.
  • ring wall foundation — A ring wall foundation is a base made of concrete, used to put large tanks on.
  • rotary-wing aircraft — an aircraft, esp a helicopter, that is lifted or propelled by rotating airfoils
  • royal air force list — an official list of all serving commissioned officers of the RAF and reserve officers liable for recall
  • saint anthony's fire — any of certain skin conditions that are of an inflammatory or gangrenous nature, as erysipelas, hospital gangrene, or ergotism.
  • sarcastic fringehead — any fish of the genus Neoclinus, characterized by a row of fleshy processes on the head, as N. blanchardi (sarcastic fringehead) of California coastal waters.
  • self-differentiating — to form or mark differently from other such things; distinguish.
  • senior aircraftwoman — a rank in the Royal Air Force comparable to that of a private in the army, though not the lowest rank in the Royal Air Force
  • separation of powers — the principle or system of vesting in separate branches the executive, legislative, and judicial powers of a government.
  • sergeant first class — a noncommissioned officer ranking next above a staff sergeant and below a first or master sergeant.
  • serious fraud office — a UK government office responsible for investigating and prosecuting serious fraud cases
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