21-letter words containing a, o, r, t, i, s

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.
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.
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 acting profession — actors considered as a group
the barber of seville — Italian Il barbiere di Siviglia. a comic opera (1816) by Gioacchino Rossini based on a comedy (1775) by Beaumarchais.
the central provinces — the Canadian provinces of Ontario and Quebec
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 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
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.
theoretical physicist — a scientist who studies theoretical physics
thermal decomposition — Thermal decomposition is the process in which a chemical species breaks down when its temperature is increased.
thermal power station — a power station in which heat is converted into electricity
threshold wage policy — a policy whereby wages are increased in accordance with inflation
throw one's hat at it — to give up all hope of getting or achieving something
to be arrayed against — to be opposed to
to be in dire straits — to be in a position of acute difficulty
to have green fingers — If someone has green fingers, they are very good at gardening and their plants grow well.
to lay something bare — If you lay something bare, you uncover it completely so that it can then be seen.
to mix your metaphors — If you mix your metaphors, you use two conflicting metaphors. People do this accidentally, or sometimes deliberately as a joke.
to rear its ugly head — If something unpleasant rears its head or rears its ugly head, it becomes visible or noticeable.
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.
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 sow your wild oats — If a young person sows their wild oats, they behave in a rather uncontrolled way, especially by having a lot of sexual relationships.
toussaint l'ouverture — François Dominique [frahn-swa dawmee-neek] /frɑ̃ˈswa dɔmiˈnik/ (Show IPA), 1743–1803, Haitian patriot and leader of the Haitian Revolution slave rebellion.
trades union congress — The Trades Union Congress in Britain is the same as the TUC.
transformational rule — Linguistics. a rule of transformational grammar that relates two phrase markers in the course of a derivation from the deep to the surface syntactic representation of a sentence, as by reordering, inserting, or deleting elements; a rule that converts deep structures into surface structures.
transport segregation — Transport segregation is when particles from a mixture separate because the mixture vibrates while it is being moved.
traveling salesperson — a representative of a business firm who travels in an assigned territory soliciting orders for a company's services.
triangulation station — a point used in triangulation as a basis for making maps. Triangulation stations are marked in a number of ways, such as by a tapering stone pillar on a hilltop
triple superphosphate — superphosphate (def 2).
triple-superphosphate — Also called acid phosphate. a mixture of calcium acid phosphate and calcium sulfate prepared by treating phosphate rock with sulfuric acid: used chiefly as a fertilizer.
tumor necrosis factor — a protein, produced in humans and other animals, that is destructive to cells showing abnormally rapid growth: identical with cachectin. Abbreviation: TNF.
uk overseas territory — any of the territories that are governed by the UK but lie outside the British Isles; many were formerly British crown colonies: includes Bermuda, Falkland Islands, and Montserrat
ulster unionist party — a Northern Irish political party advocating the maintenance of union with the UK

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