17-letter words containing o, s, i
- topological space — a set with a collection of subsets or open sets satisfying the properties that the union of open sets is an open set, the intersection of two open sets is an open set, and the given set and the empty set are open sets.
- tortoiseshell cat — a domestic cat, especially a female one, of variegated black, yellow, and white coloring.
- trade association — an association of people or companies in a particular business or trade, organized to promote their common interests.
- traffic diversion — a special route arranged for traffic to follow when the normal route cannot be used
- transfer function — The transfer function of a circuit is the ratio of the response to the input.
- transformationist — transformist.
- transignification — (in the Eucharist) a change in the significance of the bread and wine to symbolize the body and blood of Christ.
- transition region — a thin and very irregular layer of the sun's atmosphere that separates the hot corona from the much cooler chromosphere.
- transitory action — an action that can be brought in any country regardless of where it originated
- transmission line — a system of conductors, as coaxial cable, a wave guide, or a pair of parallel wires, used to transmit signals.
- transonic barrier — sound barrier.
- triboluminescence — luminescence produced by friction, usually within a crystalline substance.
- tridimensionality — having three dimensions.
- triskaidekaphobia — fear or a phobia concerning the number 13.
- trobriand islands — a group of coral islands in the Solomon Sea, north of the E part of New Guinea: part of Papua New Guinea. Area: about 440 sq km (170 sq miles)
- troilus butterfly — spicebush swallowtail.
- trucial sheikdoms — an independent federation in E Arabia, formed in 1971, now comprising seven emirates on the S coast (formerly, Pirate Coast or Trucial Coast) of the Persian Gulf, formerly under British protection: Abu Dhabi, Dubai, Sharjah, Ajman, Umm al-Qaiwain, Ras al-Khaimah (joined 1972), and Fujairah. About 32,300 sq. mi. (83,657 sq. km). Capital: Abu Dhabi. Abbreviation: U.A.E.
- ts'ao hsueh-ch'in — (Ts'ao Chan) c1717–63, Chinese novelist: author of The Dream of the Red Chamber.
- tungsten trioxide — a heavy, canary-yellow, water-insoluble powder, WO 3 , used in the manufacture of tungstates.
- turbinado (sugar) — a partially refined, granulated, pale-brown sugar obtained by washing raw sugar in a centrifuge until most of the molasses is removed
- turkish towelling — woven cloth which is used to make towels, wash cloths, etc
- turn-down service — In a hotel, a turn-down service is the preparation of a room for a guest to sleep in by slightly turning back the comforter on the bed, turning down the lights, and so on.
- ultraconservative — extremely conservative, especially in politics.
- ultrametamorphism — metamorphism during which the temperature of a rock exceeds its melting point.
- unclassified road — a road that has not been given a grade because it is of a basic standard
- uncle tom's cabin — an antislavery novel (1852) by Harriet Beecher Stowe.
- uncompassionately — having or showing compassion: a compassionate person; a compassionate letter.
- unconscientiously — governed by conscience; controlled by or done according to one's inner sense of what is right; principled: She's a conscientious judge, who does not let personal prejudices influence her decisions.
- unconventionalist — not conventional; not bound by or conforming to convention, rule, or precedent; free from conventionality: an unconventional artist; an unconventional use of material.
- uncooperativeness — working or acting together willingly for a common purpose or benefit.
- under the sign of — during that portion of the year when the sun is passing through and thus subject to the influence of (a specified sign of the zodiac)
- undercompensation — to compensate or pay less than is fair, customary, or expected.
- uniformitarianism — supporting, conforming to, or derived from a theory or doctrine about uniformity, especially on the subject of geology.
- unity of interest — the equal interest in property held by joint tenants
- unofficial strike — a strike that is not approved by the strikers' trade union
- unprofessionalism — not professional; not pertaining to or characteristic of a profession.
- unrealized losses — Unrealized losses are losses from the decrease in value of an asset that you still own.
- unreconstructible — not capable of being reconstructed.
- unselfconsciously — in an unselfconscious manner
- urogenital system — the urinary tract and reproductive organs
- utagawa kuniyoshi — original name Igusa Magosabwo. 1797–1861, Japanese painter and printmaker of the ukiyo-e school, best known for his prints of warriors and landscapes
- utmost good faith — a principle used in insurance contracts, legally obliging all parties to reveal to the others any information that might influence the others' decision to enter into the contract
- utopian socialism — (sometimes initial capital letter) an economic system based on the premise that if capital voluntarily surrendered its ownership of the means of production to the state or the workers, unemployment and poverty would be abolished.
- vacant possession — ownership of an unoccupied house or property, any previous owner or tenant having departed
- vacuum aspiration — menstrual extraction.
- vehicle emissions — substances emitted from a vehicle as a result of internal combustion
- veiltail goldfish — an artificially bred, indoor variety of goldfish, usually golden or calico and of a spheroid shape, having a fully divided, drooping tail fin exceeding the body in length.
- ventilation shaft — a shaft in a mine, tunnel, or building used for providing ventilation or fresh air
- vermiform process — vermiform appendix.
- video disk player — a device that reads the information on a video disc