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20-letter words containing o, n, d, r

  • fission-track dating — the dating of samples of minerals by comparing the tracks in them by fission fragments of the uranium nuclei they contain, before and after irradiation by neutrons
  • fixed action pattern — a highly stereotyped pattern of behavior that is characteristic of a particular species.
  • fixed-price contract — a contract in which the price is preset and invariable, regardless of the actual costs of production.
  • fold-and-thrust belt — a linear or arcuate region of the earth's surface that has been subjected to severe folding and thrust faulting
  • fondue bourguignonne — a dish consisting of pieces of steak impaled on forks, cooked in oil at the table and dipped in sauces
  • for sb's delectation — If you do something for someone's delectation, you do it to give them enjoyment or pleasure.
  • forbidden transition — an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
  • force someone's hand — to force someone to act
  • force-field analysis — a decision-making technique, often presented graphically, that identifies all the positive and negative forces impinging on a problem
  • fore-and-aft topsail — gaff topsail (def 1).
  • fourteenth amendment — an amendment to the U.S. Constitution, ratified in 1868, defining national citizenship and forbidding the states to restrict the basic rights of citizens or other persons.
  • frequency modulation — FM.
  • fridtjof nansen land — Franz Josef Land.
  • friends of the earth — an organization of environmentalists and conservationists whose aim is to promote the sustainable use of the earth's resources
  • front-end volatility — Front-end volatility is the ability of the fractions with lower boiling points, such as butane, to evaporate at normal temperatures.
  • gastroduodenostomies — Plural form of gastroduodenostomy.
  • get under one's skin — the external covering or integument of an animal body, especially when soft and flexible.
  • gill-over-the-ground — ground ivy.
  • godefroy de bouillon — c1060–1100, French crusader.
  • goldenhar's syndrome — a congenital disorder in which one side of the face is malformed, often with an enlargement of one side of the mouth. There may also be hearing loss, curvature of the spine, and mild retardation
  • good driver discount — A good driver discount is a discount on insurance that is available to drivers who have no at-fault accidents and no traffic offenses during a particular period.
  • good neighbor policy — a diplomatic policy of the U.S., first presented in 1933 by President Franklin Roosevelt, for the encouragement of friendly relations and mutual defense among the nations of the Western Hemisphere.
  • governador valadares — a city in E Brazil.
  • grand unified theory — a possible future quantum field theory that would encompass both the electroweak theory and quantum chromodynamics. Abbreviation: GUT.
  • gravitational radius — Schwarzschild radius.
  • great northern diver — a large northern bird, Gavia immer, with a black-and-white chequered back and a black head and neck in summer: family Gaviidae (divers)
  • great-great-grandson — the grandson of a grandchild
  • greatest lower bound — a lower bound that is greater than or equal to all the lower bounds of a given set: 1 is the greatest lower bound of the set consisting of 1, 2, 3. Abbreviation: glb.
  • green monkey disease — Marburg disease.
  • grey-crowned babbler — an insect-eating Australian bird, Pomatostomus temporalis of the family Timaliidae
  • group code recording — (storage)   (GCR) A recording method used for 6250 BPI magnetic tapes. GCR typically uses a group of five bits of code to represent four bits of data. The encoding ensures no more than two or three zeros occur in a row, and no more than eight or so ones occur in a row, where zeros represent an absense of magnetic change. GCR is also used on Commodore Business Machines diskette drives; the 4040, 8050, 154x, 157x and 158x series of 5.25" and 3.5" low and high density diskette drives used with 8-bit home computers circa 1977 to 1992. It was also supported on Amiga internal and external drives but only used for reading non-Amiga disks. Compare NRZI, PE.
  • guarded horn clauses — (language)   (GHC) A parallel dialect of Prolog by K. Ueda in which each clause has a guard. GHC is similar to Parlog. When several clauses match a goal, their guards are evaluated in parallel and the first clause whose guard is found to be true is used and others are rejected. It uses committed-choice nondeterminism. See also FGHC, KL1.
  • happy hunting ground — the North American Indian heaven, conceived of as a paradise of hunting and feasting for warriors and hunters.
  • herringbone bridging — Carpentry. cross bridging.
  • heston and isleworth — a former borough, now part of Hounslow, in SE England, near London.
  • hickory horned devil — regal moth
  • hildegard von bingen — Hildegard von (Hildegard of Bingen"Sibyl of the Rhine") 1098–1178, German nun, healer, writer, and composer.
  • holder in due course — a person who has received a negotiable instrument in good faith and without notice that it is overdue, that there is any prior claim, or that there is a defect in the title of the person who negotiated it.
  • horizontal microcode — (processor)   Microcode using horizontal encoding.
  • horizontally opposed — A horizontally opposed engine has the cylinders set horizontally at either side of the crankshaft.
  • hospitality industry — the hotel and accommodation industry
  • hot under the collar — the part of a shirt, coat, dress, blouse, etc., that encompasses the neckline of the garment and is sewn permanently to it, often so as to fold or roll over.
  • hurricane-force wind — a wind, not necessarily a hurricane, having a speed of more than 72 miles per hour (32 m/sec): the strongest of the winds.
  • hydraulic suspension — a system of motor-vehicle suspension using hydraulic members, often with hydraulic compensation between front and rear systems (hydroelastic suspension)
  • hydrodesulfurization — desulfurization by catalytic agents of the sulfur-rich hydrocarbons obtained from petroleum or the like during cracking or hydrocracking.
  • hyperadrenocorticism — Cushing's syndrome.
  • hypodermic injection — the injection of a medicine or drug under the skin
  • ideal of pure reason — God, seen as an idea of pure reason unifying the personal soul with the cosmos.
  • imported currantworm — the larva of any of several insects, as a sawfly, Nematus ribesii (imported currantworm) which infests and feeds on the leaves and fruit of currants.
  • in flagrante delicto — Law. in the very act of committing the offense.
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