15-letter words containing y, s
- taylor's series — an infinite sum giving the value of a function f(z) in the neighbourhood of a point a in terms of the derivatives of the function evaluated at a. Under certain conditions, the series has the form f(z) = f(a) + [f′(a)(z – a)]/1! + [f″(a)(z – a)2]/2! + …
- tensor analysis — the branch of mathematics dealing with the calculus of tensors, especially the study of properties that are unaffected by a change of coordinate system.
- tertiary sector — The tertiary sector consists of industries which provide a service, such as transport and finance.
- test ban treaty — a treaty which bans nations testing some or all types of nuclear weapons
- thalassotherapy — the use of sea water and marine products as a therapeutic treatment
- the early hours — If something happens in the early hours, in the small hours, or in the wee hours, it happens in the early morning after midnight.
- the jury is out — If you say that the jury is out or that the jury is still out on a particular subject, you mean that people in general have still not made a decision or formed an opinion about that subject.
- the paralympics — a sporting event, modelled on the Olympic Games, held solely for disabled competitors
- the present day — The present day is the period of history that we are in now.
- the smart money — If you say that the smart money is on a particular person or thing, you mean that people who know a lot about it think that this person will be successful, or this thing will happen.
- theory of games — game theory.
- theory of types — a theory advanced by Bertrand Russell to avoid the liar paradox, Russell's paradox, etc, in which a class of expressions or of the entities they represent can all enter into the same syntactic relations
- thermochemistry — the branch of chemistry dealing with the relationship between chemical action and heat.
- thirtysomething — a person in her or his thirties
- thursday island — an island in Torres Strait between NE Australia and New Guinea; part of Queensland: pearl fishing. 1½ sq. mi. (4 sq. km).
- tiffany setting — a setting, as in a ring, in which the stone is held with prongs.
- to do your best — If you do your best or try your best to do something, you try as hard as you can to do it, or do it as well as you can.
- to play footsie — If someone plays footsie with you, they touch your feet with their own feet, for example under a table, often as a playful way of expressing their romantic or sexual feelings towards you.
- to save the day — If someone or something saves the day in a situation which seems likely to fail, they manage to make it successful.
- toxic psychosis — a psychosis resulting from the toxic effect of chemicals, drugs, or certain intrinsic metabolic states.
- 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).
- transactionally — the act of transacting or the fact of being transacted.
- transferability — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
- 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
- transnationally — going beyond national boundaries or interests: a transnational economy.
- transvaal daisy — a composite plant, Gerbera jamesonii, native to southern Africa, having showy, many-rayed, variously colored flower heads.
- traveller's joy — a ranunculaceous Old World climbing plant, Clematis vitalba, having white flowers and heads of feathery plumed fruits
- tray classifier — A tray classifier is a tank for leaching from a dispersed solid, in which pulp at the bottom of the tank is raked (= moved to the exit) while solvent is forced toward the bottom of the tank.
- treaty of paris — a treaty of 1763 signed by Britain, France, and Spain that ended their involvement in the Seven Years' War
- tricotyledonous — having three cotyledons.
- tristram shandy — a novel (1759–67) by Laurence Sterne.
- trust territory — a territory under the administrative control of a country designated by the United Nations.
- trypanosomiasis — any infection caused by a trypanosome.
- turk's-cap lily — either of two lilies, Lilum martagon or L. superbum, having nodding flowers with the perianth segments rolled backward.
- turkish cypriot — denoting ethnically Turkish inhabitants of Cyprus
- tutorial system — a system of education, especially in some colleges, in which instruction is given personally by tutors, who also act as general advisers of a small group of students in their charge.
- tychonic system — a model for planetary motion devised by Tycho Brahe in which the earth is stationary and at the center of the planetary system, the sun and moon revolve around the earth, and the other planets revolve around the sun.
- type 1 diabetes — diabetes (def 3).
- type 2 diabetes — diabetes (def 4).
- type i diabetes — diabetes (def 3).
- tyrwhitt-wilson — Gerald Hugh, 14th Baron Berners [bur-nerz] /ˈbɜr nərz/ (Show IPA), 1883–1950, English composer, painter, and author.
- u-shaped valley — a steep-sided valley caused by glacial erosion
- ultramicroscopy — the use of the ultramicroscope.
- ultrasonography — a diagnostic imaging technique utilizing reflected high-frequency sound waves to delineate, measure, or examine internal body structures or organs.
- ulysses s grant — Cary (Archibald Leach) 1904–86, U.S. actor, born in England.
- un-fortuitously — happening or produced by chance; accidental: a fortuitous encounter.
- unadventurously — in an unadventurous manner
- unaesthetically — offensive to the aesthetic sense; lacking in beauty or sensory appeal; unpleasant, as an object, design, arrangement, etc.: an unaesthetic combination of colors.
- unanswerability — the quality of not being answerable or contestable