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21-letter words containing f, e, r, o, n, i

  • purple-fringed orchid — either of two orchids, Habenaria fimbriata or H. psycodes, of eastern North America, having a cluster of fragrant purple flowers with a fringed lip.
  • purple-fringed orchis — either of two North American orchids (Habenaria psycodes and H. fimbriata) with purple-fringed flowers
  • radius of convergence — a positive number so related to a given power series that the power series converges for every number whose absolute value is less than this particular number.
  • range of significance — the set of subjects for which a given predicate is intelligible
  • reconnaissance flight — a flight made by an aircraft in order to obtain military information about a particular place
  • record of achievement — a statement of the personal and educational development of each pupil
  • reinforcement therapy — a behavior modification technique in which appropriate behavior is strengthened through systematic reinforcement.
  • return from interrupt — (programming)   (RTI) An instruction mnemonic on many computers including the 6502 and 6800. The variant "RETI" is found among former Zilog Z80 hackers (almost nobody programs these things in assembly code anymore). The Intel 80x86 equivalent is "IRET".
  • road traffic accident — an accident involving vehicles
  • rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
  • saint-maur-des-fosses — a town in N central France, near Paris, on the Marne River.
  • saponification number — the number of milligrams of potassium hydroxide required to saponify one gram of a given ester, especially a glyceride.
  • satisficing behaviour — the form of behaviour demonstrated by firms who seek satisfactory profits and satisfactory growth rather than maximum profits
  • self-characterization — portrayal; description: the actor's characterization of a politician.
  • set the world on fire — the earth or globe, considered as a planet.
  • sieve of eratosthenes — a method of obtaining prime numbers by sifting out the composite numbers from the set of natural numbers so that only prime numbers remain.
  • silicon tetrafluoride — a colorless, fuming gas, SiF 4 , used chiefly in the manufacture of fluosilicic acid.
  • sing for one's supper — to obtain something by performing a service
  • snap one's fingers at — any of the terminal members of the hand, especially one other than the thumb.
  • something for nothing — If you say that someone is getting something for nothing, you disapprove of the fact that they are getting what they want without doing or giving anything in return.
  • south pacific current — an ocean current that flows E in the South Pacific Ocean parallel to the Antarctic Circumpolar Current.
  • sovereign wealth fund — an investment fund created using the financial assets of a national government
  • spirits of turpentine — oil of turpentine.
  • stare one in the face — to be glaringly obvious or imminent
  • stations of the cross — a series of 14 crosses, often accompanied by 14 pictures or carvings, arranged in order around the walls of a church, to commemorate 14 supposed stages in Christ's journey to Calvary
  • sun protection factor — SPF.
  • surface friction drag — the part of the drag on a body moving through a fluid that is dependent on the nature of the surface of the body
  • surface of projection — the surface upon which an image or a set of points is projected.
  • surface of revolution — a surface formed by revolving a plane curve about a given line.
  • sweet spirit of nitre — ethyl nitrite spirit.
  • synchronized shifting — gear shifting in which the gears to be meshed are made to rotate at the same speed.
  • take one's finger out — stop delaying or procrastinating
  • teacher certification — official qualifications for educators
  • tetrabromofluorescein — eosin (def 1).
  • the acting profession — actors considered as a group
  • the battle of britain — from August to October 1940, the prolonged bombing of S England by the German Luftwaffe and the successful resistance by the RAF Fighter Command, which put an end to the German plan of invading Britain
  • the birth of a nation — an American film (1915), directed by D. W. Griffith.
  • the microsoft network — (networking)   (MSN) Microsoft's ISP and online content service, launched in October 1996. Not to be confused with Microsoft Networking. MSN was originally based on custom software and protocols, however Microsoft saw the error of their ways and adopted Internet standards. MSN now provides standard WWW and email facilities, albeit with Microsoft's Internet Explorer web-browser and the Outlook Express email software. The service also provides "Community Services" including newsgroups, forums, and chat.
  • the middle of nowhere — remote place
  • the oldest profession — prostitution
  • the origin of species — (On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) a treatise (1859) by Charles Darwin setting forth his theory of evolution.
  • the shipping forecast — a radio broadcast made by the BBC of weather reports and forecasts for the seas around the British Isles
  • the stationery office — (in the UK) the company that supplies the civil service with all its office supplies, machinery, printing and binding, etc
  • theater of operations — the part of the theater of war, including a combat zone and a communications zone, that is engaged in military operations and their support.
  • tide-generating force — the difference between the force of gravity exerted by the moon or the sun on a particle of water in the ocean and that exerted on an equal mass of matter at the centre of the earth. The lunar tide-generating forces are about 2.2 times greater than are the solar ones
  • to cross your fingers — If you cross your fingers, you put one finger on top of another and hope for good luck. If you say that someone is keeping their fingers crossed, you mean they are hoping for good luck.
  • to fall into the trap — If someone falls into the trap of doing something, they think or behave in a way which is not wise or sensible.
  • to have green fingers — If someone has green fingers, they are very good at gardening and their plants grow well.
  • to lay down your life — If someone lays down their life for another person, they die so that the other person can live.
  • to risk life and limb — If someone risks life and limb, they do something very dangerous that may cause them to die or be seriously injured.
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