21-letter words containing a, o, r
- stokes-adams syndrome — unconsciousness accompanying atrioventricular heart block, sometimes characterized by weakness, irregular pulse, and intermittent convulsive or nonconvulsive seizures.
- stop loss reinsurance — Stop loss reinsurance is a form of reinsurance under which the reinsurer pays the cedant's losses in any year over a particular percentage of the earned premium.
- strachey, christopher — Christopher Strachey
- strategic air command — a U.S. Air Force command charged with intercontinental air strikes, especially nuclear attacks.
- structural psychology — psychology centering on the analysis of the structure or content of conscious mental states by introspective methods.
- 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.
- sunday school teacher — someone who teaches at a Sunday school
- 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.
- surface-to-underwater — (of a missile, message, etc.) traveling from the surface of the earth to a target underwater.
- sympathetic vibration — a vibration induced by resonance.
- synchrotron radiation — electromagnetic radiation emitted by charged particles as they pass through magnetic fields.
- systeme international — Système International d'Unités
- take one's finger out — stop delaying or procrastinating
- take sb at their word — If you take someone at their word, you believe what they say, when they did not really mean it or when they meant something slightly different.
- take sb/sth seriously — If you take someone or something seriously, you believe that they are important and deserve attention.
- take someone prisoner — to capture and hold someone as a prisoner, esp as a prisoner of war
- tape operating system — (operating system) (TOS) An IBM operating system for System 360, used in the early days around 1965 to support the IBM 360 model 30 et al. TOS was a predecessor to IBM's Disk Operating System. TOS died out really early as disks such as the 2311 and 2314 became common with the IBM 360 whereas thet had been a real luxury on the IBM 7090.
- 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
- temperature inversion — inversion (def 12).
- tenure track position — a position or office that carries with it the opportunity to eventually obtain tenure or the right to permanent employment
- terrestrial radiation — long-wave electromagnetic radiation in the form of heat emitted from the earth's surface and atmosphere.
- terrestrial telescope — a refracting telescope having inverting lenses or an eyepiece that presents an erect image.
- tetrabromofluorescein — eosin (def 1).
- the (norman) conquest — the conquering of England by the Normans under William the Conqueror in 1066
- the acting profession — actors considered as a group
- the apple of your eye — If you say that someone is the apple of your eye, you mean that they are very important to you and you are extremely fond of them.
- the barber of seville — Italian Il barbiere di Siviglia. a comic opera (1816) by Gioacchino Rossini based on a comedy (1775) by Beaumarchais.
- 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 break of day/dawn — The break of day or the break of dawn is the time when it begins to grow light after the night.
- the central provinces — the Canadian provinces of Ontario and Quebec
- the comrades marathon — an annual long-distance race run every year on the 16th of June from Durban to Pietermaritzburg, a distance of approximately 90 kilometres (56 miles)
- the corncracker state — a nickname for the state of Kentucky
- the cream of the crop — You can refer to the best people or things of a particular kind as the cream of the crop.
- the face of the earth — You can use the expression 'on the face of the earth' to mean 'in the whole world', when you are emphasizing a statement that you are making or making a very exaggerated statement.
- the fall of the cards — the chance distribution of cards in a given deal
- the fast track to sth — the quickest or most direct route or system
- the household cavalry — a group of British soldiers on horseback who have the job of protecting the king or queen and their family
- 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.