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18-letter words containing f, r, e, u, n

  • relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
  • reproduction proof — repro proof.
  • return to the fold — come back home
  • return-flue boiler — a fire-tube boiler having flues that collect the combustion gases at the end of the boiler opposite the fire door and pass them through the boiler to an uptake above the fire door.
  • room for manoeuvre — If you have room for manoeuvre, you have the opportunity to change your plans if it becomes necessary or desirable.
  • rule of engagement — a directive issued by a military authority controlling the use and degree of force, especially specifying circumstances and limitations for engaging in combat.
  • russian federation — a republic extending from E Europe to N and W Asia. 6,593,000 sq. mi. (17,076,000 sq. km). Capital: Moscow.
  • safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
  • sampling frequency — sample rate
  • scruff of the neck — If someone takes you by the scruff of the neck, they take hold of the back of your neck or collar suddenly and roughly.
  • security of tenure — (in Britain) the right of a tenant to continue to occupy a dwelling or site unless the landlord obtains a court order for possession of the property or termination of the tenancy agreement
  • selenium rectifier — a rectifier consisting of laminated plates of metal, usually iron, that have been coated with selenium on one side, with rectification taking place because the flow of electrons from the conductive metal to the selenium occurs more readily than the flow in the opposite direction.
  • self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
  • self-preoccupation — the state of being preoccupied.
  • self-raising flour — flour with baking powder
  • self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • shift one's ground — to change one's argument or defense
  • shrubby cinquefoil — a small shrub, Potentilla fruticosa, of the rose family, native to the Northern temperate region, having pinnate leaves and numerous, showy, bright-yellow flowers.
  • silvery cinquefoil — any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
  • six-finger country — an isolated area considered as being inhabited by people who practise inbreeding
  • soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
  • sound and the fury — a novel (1929) by William Faulkner.
  • spur-of-the-moment — occurring or done without advance preparation or deliberation; extemporaneous; unplanned: a spur-of-the-moment decision.
  • squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
  • subsistence farmer — a farmer who consumes most of the produce he grows, leaving little or nothing to be marketed
  • sulfuric anhydride — sulfur trioxide.
  • sunflower seed oil — the oil extracted from sunflower seeds, used as a salad oil, in the manufacture of margarine, etc
  • symmetric function — a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.
  • the full treatment — If you say that someone is given the full treatment, you mean either that they are treated extremely well or that they are treated extremely severely.
  • torsion-free group — a group in which every element other than the identity has infinite order.
  • transfinite number — an infinite cardinal or ordinal number.
  • tune someone grief — to annoy or harass someone
  • turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
  • ultralow frequency — an electromagnetic wave with a frequency between 300 and 3000 hertz. Abbreviation: ULF, ulf.
  • under the aegis of — guided or protected by
  • unfair competition — acts done by a seller to confuse or deceive the public with intent to acquire a larger portion of the market, as by cutting prices below cost, misleading advertising, selling a spurious product under a false identity, etc.
  • universal suffrage — suffrage for all persons over a certain age, usually 18 or 21, who in other respects satisfy the requirements established by law.
  • university faculty — a division within a university comprising one subject area, or a number of related subject areas
  • uriniferous tubule — a urine-bearing tubule in a nephron of a kidney.
  • very low frequency — any frequency between 3 and 30 kilohertz. Abbreviation: VLF.
  • weak nuclear force — weak interaction
  • wildlife sanctuary — an area where wild animals and plants are protected
  • xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.
  • zone of saturation — the ground below the water table
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