15-letter words containing a, t, r, i, s
- the saint leger — an annual horse race run at Doncaster since 1776: one of the classics of the flat-racing season
- the santa maria — the flagship of Columbus on his first voyage to America (1492)
- the square mile — the area in central London in which the United Kingdom's major financial business is transacted
- theft insurance — insurance against loss or damage of property resulting from theft.
- thermanesthesia — loss of ability to feel cold or heat; loss of the sense or feeling of temperature.
- thorndike's law — the principle that all learnt behaviour is regulated by rewards and punishments, proposed by Edward Lee Thorndike (1874–1949), US psychologist
- thursday island — an island in Torres Strait between NE Australia and New Guinea; part of Queensland: pearl fishing. 1½ sq. mi. (4 sq. km).
- tiglath-pileser — died 727 b.c, king of Assyria 745–727.
- tirso de molina — Luis [loo-ees] /luˈis/ (Show IPA), 1535–1600, Spanish Jesuit theologian.
- title insurance — insurance protecting the owner or mortgagee of real estate from lawsuits or claims arising from a defective title.
- to err is human — If you say that to err is human, you mean that it is natural for human beings to make mistakes.
- to make friends — If you make friends with someone, you begin a friendship with them. You can also say that two people make friends.
- torsion balance — an instrument for measuring small forces, as electric attraction or repulsion, by determining the amount of torsion or twisting they cause in a slender wire or filament.
- total serialism — (in some music after 1945) the use of serial techniques applied to such elements as rhythm, dynamics, and tone colour, as found in the early works of Stockhausen, Boulez, etc
- totalitarianism — the practices and principles of a totalitarian regime.
- totalitarianist — the practices and principles of a totalitarian regime.
- toucan crossing — a place where people who are walking and cyclists can both cross a busy road together. They press a button at the side of the road, which operates traffic lights to stop the traffic
- tourist traffic — the number of tourists that visit an area
- towers of hanoi — (games) A classic computer science problem, invented by Edouard Lucas in 1883, often used as an example of recursion. "In the great temple at Benares, says he, beneath the dome which marks the centre of the world, rests a brass plate in which are fixed three diamond needles, each a cubit high and as thick as the body of a bee. On one of these needles, at the creation, God placed sixty-four discs of pure gold, the largest disc resting on the brass plate, and the others getting smaller and smaller up to the top one. This is the Tower of Bramah. Day and night unceasingly the priests transfer the discs from one diamond needle to another according to the fixed and immutable laws of Bramah, which require that the priest on duty must not move more than one disc at a time and that he must place this disc on a needle so that there is no smaller disc below it. When the sixty-four discs shall have been thus transferred from the needle on which at the creation God placed them to one of the other needles, tower, temple, and Brahmins alike will crumble into dust, and with a thunderclap the world will vanish." The recursive solution is: Solve for n-1 discs recursively, then move the remaining largest disc to the free needle. Note that there is also a non-recursive solution: On odd-numbered moves, move the smallest sized disk clockwise. On even-numbered moves, make the single other move which is possible.
- track athletics — sporting activities, such as relay running or sprinting, which take place on a running track
- trading profits — profits made from the buying and selling of goods and services
- training course — practical programme of study
- training scheme — a scheme for teaching people skills in a particular field or profession
- training school — a school that provides training in some art, profession, or vocation.
- training wheels — a pair of small wheels attached one on each side of the rear wheel of a bicycle for stability while one is learning to ride.
- trainspotterish — obsessed with trivial details, esp of a subject generally considered uninteresting
- trans-himalayan — the, a mountain range extending about 1500 miles (2400 km) along the border between India and Tibet. Highest peak, Mt. Everest, 29,028 feet (8848 meters).
- trans-jordanian — of or relating to the former Trans-Jordan (now Jordan) or its inhabitants
- transactionally — the act of transacting or the fact of being transacted.
- transequatorial — of, relating to, or near an equator, especially the equator of the earth.
- transfer window — the period during the year in which a football club can transfer players from other teams into their own
- transferability — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
- transfiguration — the act of transfiguring.
- transgressional — of or relating to transgression
- transhistorical — occurring throughout all human history
- transilluminate — to cause light to pass through.
- transindividual — a single human being, as distinguished from a group.
- transition team — a group of people who manage the transition between one system, administrative regime, etc and another
- transitive verb — a verb accompanied by a direct object and from which a passive can be formed, as deny, rectify, elect.
- translatability — to turn from one language into another or from a foreign language into one's own: to translate Spanish.
- translationally — in a manner which uses translation
- transliteration — to change (letters, words, etc.) into corresponding characters of another alphabet or language: to transliterate the Greek Χ as ch.
- transmissometer — an instrument for measuring visibility or the transmission of light in the atmosphere.
- transnationally — going beyond national boundaries or interests: a transnational economy.
- transplantation — to remove (a plant) from one place and plant it in another.
- transubstantial — to change from one substance into another; transmute.
- transvaal daisy — a composite plant, Gerbera jamesonii, native to southern Africa, having showy, many-rayed, variously colored flower heads.
- transverse axis — the axis of a hyperbola that passes through the two foci.
- trapdoor spider — any of various, often large, spiders (esp. family Ctenizidae) that dig a burrow and cover the entrance with a hinged lid like a trapdoor
- travel sickness — nausea caused by motion