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21-letter words containing c, r, o, i

  • strategic air command — a U.S. Air Force command charged with intercontinental air strikes, especially nuclear attacks.
  • student participation — the extent to which students participate or involve themselves in a class, course, etc
  • subliminal perception — perception of or reaction to a stimulus that occurs without awareness or consciousness
  • substitution reaction — the replacement of an atom or group of atoms in a compound by another atom or group.
  • suction and curettage — a technique involving extraction of the fetus through a suction tube, used to perform abortions during the early stages of pregnancy.
  • summary court-martial — a court-martial composed of one commissioned officer, authorized to try minor offenses against military law.
  • sun protection factor — SPF.
  • supergranulation cell — one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.
  • surface acoustic wave — an acoustic wave generated on the surface of a piezoelectric substrate: used as a filter in electronic circuits
  • 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.
  • sympathetic vibration — a vibration induced by resonance.
  • synchronized shifting — gear shifting in which the gears to be meshed are made to rotate at the same speed.
  • synchronized swimming — a sport growing out of water ballet in which swimmers, in solo, duet, and team efforts, complete various required figures by performing motions in relatively stationary positions, along with a freestyle competition, with the contestants synchronizing movements to music and being judged for body position, control, and the degree of difficulty of the moves.
  • synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
  • tartarian honeysuckle — an Asian honeysuckle, Lonicera tatarica, having fragrant, white to pink flowers.
  • teacher certification — official qualifications for educators
  • teleological argument — the argument purporting to prove the existence of God from empirical facts, the premise being that the universe shows evidence of order and hence design
  • tenure track position — a position or office that carries with it the opportunity to eventually obtain tenure or the right to permanent employment
  • terrestrial telescope — a refracting telescope having inverting lenses or an eyepiece that presents an erect image.
  • tetrabromofluorescein — eosin (def 1).
  • the acting profession — actors considered as a group
  • the central provinces — the Canadian provinces of Ontario and Quebec
  • the joker in the pack — If you describe someone or something as the joker in the pack, you mean that they are different from the other people or things in their group, and can be unpredictable.
  • 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 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 press association — the national news agency for the United Kingdom and Ireland
  • the probation service — a criminal justice service that is mainly responsible for dealing with offenders by placing them under the supervision of a probation officer
  • the rock of gibraltar — a limestone promontory at the tip of S Spain
  • 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
  • the throwaway society — a society full of excessive consumption and waste of food, products, etc
  • the yellow brick road — the road to success or happiness (in the film the Wizard of Oz the yellow brick road leads to Oz)
  • theoretical physicist — a scientist who studies theoretical physics
  • therapeutic community — a group-based form of therapy for mental disorders, sometimes residential
  • thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
  • thermoelectric couple — thermocouple.
  • thermoelectric effect — the production of an electromotive force in a thermocouple.
  • third party procedure — impleader.
  • threshold wage policy — a policy whereby wages are increased in accordance with inflation
  • ticker-tape reception — (mainly in New York) the showering of the motorcade of a distinguished politician, visiting head of state, etc, with ticker tape as a sign of welcome
  • 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 be public property — to be publicly owned
  • 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 kill a mockingbird — a novel (1960) by Harper Lee.
  • to sink without trace — If you say that someone or something sinks without trace or sinks without a trace, you mean that they stop existing or stop being successful very suddenly and completely.
  • to stick in your mind — If something sticks in your mind, it remains firmly in your memory.
  • to stick to your guns — If you stick to your guns, you continue to have your own opinion about something even though other people are trying to tell you that you are wrong.
  • topological invariant — a property of a topological space that is a property of every space related to the given space by a homeomorphism.
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