21-letter words containing a, s, u, i
- snr bandwidth product — (communications) The integral of the SNR over frequency. The SNR bandwidth product is an important limit in the capacity of a communication channel.
- social inquiry report — (in Britain) a report on a person and his or her circumstances, which may be required by a court before sentencing and is made by a probation officer or a social worker from a local authority social services department
- sodium metabisulphite — an inorganic compound with the chemical formula Na2S2O5 that is used as a preservative, antioxidant and disinfectant
- someone's name is mud — someone is disgraced
- 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
- space shuttle orbiter — orbiter (def 1).
- special court-martial — a court-martial established to try violations of military law less serious than those tried by a general court-martial but more serious than those tried by a summary court-martial.
- spicebush swallowtail — a swallowtail butterfly, Papilio troilus, having a dark body with yellow spots on the forewings and greenish hind wings.
- spin angular momentum — to make (yarn) by drawing out, twisting, and winding fibers: Pioneer women spun yarn on spinning wheels.
- statutory corporation — a company or other body set up by statute
- statutory declaration — a declaration made under statutory authority before a justice of the peace or commissioner for oaths which may in certain cases be substituted for a statement on oath
- steady state universe — a universe described by the steady state theory.
- 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.
- 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
- submerged arc welding — a type of heavy electric-arc welding using mechanically fed bare wire with the arc submerged in powdered flux to keep out oxygen
- subsistence allowance — money given in advance to a new soldier, employee, etc., to buy food, clothing, and pay for other necessities while awaiting a first pay.
- substitution instance — an expression so derived from another
- 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.
- supplementary benefit — (formerly) an extra amount of money that is paid to someone by the government, in addition to their normal income. Replaced by income support in 1988
- 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.
- symphonie fantastique — a programmatic symphony (1830–31) in five movements by Hector Berlioz.
- take one's finger out — stop delaying or procrastinating
- take sb/sth seriously — If you take someone or something seriously, you believe that they are important and deserve attention.
- take under advisement — to consider carefully
- 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
- tetrabromofluorescein — eosin (def 1).
- the executive mansion — the White House
- the scout association — a worldwide movement for boys or (in some countries) girls, founded as the Boy Scouts in England in 1908 by Lord Baden-Powell with the aim of developing character and responsibility
- the supreme sacrifice — the sacrifice of one's life
- third-party insurance — insurance that compensates for a loss to a party other than the insured for which the insured is liable.
- time and motion study — the systematic investigation and analysis of the motions and the time required to perform a specific operation or task with a view to seeking more efficient methods of production as well as setting time standards.
- 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 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.
- 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