20-letter words containing r, t, f
- flight data recorder — a recording device that records relevant data during an aircraft's flight
- floodlight projector — a powerful lamp having a reflector curved to produce a floodlight.
- florence nightingale — Florence ("the Lady with the Lamp") 1820–1910, English nurse: reformer of hospital conditions and procedures; reorganizer of nurse's training programs.
- fold-and-thrust belt — a linear or arcuate region of the earth's surface that has been subjected to severe folding and thrust faulting
- for all one is worth — good or important enough to justify (what is specified): advice worth taking; a place worth visiting.
- for better for worse — whatever the subsequent events or changes may be
- for future reference — If you keep information for future reference, you keep it because it might be useful in the future.
- for sb's consumption — If you do or say something for a particular person's or group's consumption, you do or say it especially for them, although your private thoughts or plans may be very different.
- for sb's delectation — If you do something for someone's delectation, you do it to give them enjoyment or pleasure.
- for the rest of them — for The Rest Of Us
- for the sake of sthg — If you do something for the sake of something, you do it for that purpose or in order to achieve that result. You can also say that you do it for something's sake.
- for your information — (FYI) A subseries of RFCs that are not technical standards or descriptions of protocols. FYIs convey general information about topics related to TCP/IP or the Internet. See also STD.
- forbidden transition — an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
- fore-and-aft topsail — gaff topsail (def 1).
- fore-topgallant mast — the spar or section of a spar forming the topgallant portion of a foremast on a ship.
- formative assessment — ongoing assessment of a pupil's educational development within a particular subject area
- fort george g. meade — a military reservation in central Maryland, SW of Baltimore.
- forty-ninth parallel — an informal name for the Canadian border with the USA, which is in part delineated by the parallel line of latitude at 49°N
- 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.
- fourth international — a loose federation of small groups of radical socialists formed in 1936 under the leadership of Leon Trotsky and hostile to the Soviet Union. Compare international (def 6).
- fractionating column — a long vertical cylinder used in fractional distillation, in which internal reflux enables separation of high and low boiling fractions to take place
- frankfurt horizontal — Craniometry. the plane established when right and left poria and left orbitale are in the same horizontal plane.
- free-range parenting — Informal. a style of child rearing in which parents allow their children to move about without constant adult supervision, aimed at instilling independence and self-reliance.
- freedom of the press — the right to publish newspapers, magazines, and other printed matter without governmental restriction and subject only to the laws of libel, obscenity, sedition, etc.
- freefall parachuting — a variety of parachuting in which the jumper manoeuvres in free fall before opening the parachute
- freight pass-through — a special allowance or discounted price given a bookseller or bookstore by a publishing house for paying the freight charge on a shipment of books ordered: so called because the shipping charge is passed on to the consumer by an increase in the suggested retail price for each book. Abbreviation: FPT.
- frequency modulation — FM.
- fridtjof nansen land — Franz Josef Land.
- friend with benefits — (used as a euphemism) a friend with whom one has sex without a romantic relationship or commitment.
- 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.
- front-to-back engine — an engine in which the crankshaft is arranged front to back along the axis of the vehicle
- frontenac et palluau — Comte de (Louis de Buade) 1620?–98, French governor of New France 1672–82, 1689–98.
- frosting on the cake — a sweet mixture, cooked or uncooked, for coating or filling cakes, cookies, and the like; icing.
- fulminate of mercury — a gray, crystalline solid, Hg(CNO) 2 , used chiefly in the manufacture of commercial and military detonators.
- fundamental particle — elementary particle.
- fundamental research — research carried out to deepen understanding of the fundamental or basic principles of something
- gentleman of fortune — an adventurer.
- geoffrey of monmouth — 1100?–1154, English chronicler.
- get away from it all — If you get away from it all, you have a holiday in a place that is very different from where you normally live and work.
- get one's finger out — to begin or speed up activity, esp after initial delay or slackness
- go from bad to worse — worsen
- grand right and left — a figure called in square dancing in which partners face each other, forming a small circle, and then advance around the circle by extending alternating right and left hands to pull past each new person until they reach their partners again.
- grand unified theory — a possible future quantum field theory that would encompass both the electroweak theory and quantum chromodynamics. Abbreviation: GUT.
- group of twenty-four — a group of twenty-four rich and industrialized countries of the world, whose heads of government meet regularly to coordinate the position of developing countries on monetary and development issues
- heat of vaporization — the heat absorbed per unit mass of a given material at its boiling point that completely converts the material to a gas at the same temperature: equal to the heat of condensation.
- hexafluoroantimonate — (inorganic chemistry) The anion SbF6- or any salt containing this anion; it is used as an acidic catalyst in epoxide opening reactions.
- houses of parliament — In Britain, the Houses of Parliament are the British parliament, which consists of two parts, the House of Commons and the House of Lords. The buildings where the British parliament does its work are also called the Houses of Parliament.
- hydraulic fracturing — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
- hydrodesulfurization — desulfurization by catalytic agents of the sulfur-rich hydrocarbons obtained from petroleum or the like during cracking or hydrocracking.