20-letter words containing t, r, o
- american labor party — a U.S. political party (1936–56) organized in New York City to gain independent political status for the labor and liberal factions of the Democratic Party.
- ammonium bicarbonate — a white, crystalline, water-soluble solid, NH 4 HCO 3 , used chiefly in the manufacture of baking powder.
- anatomically correct — having representations of the sexual organs: An anatomically correct doll was shown to the witness.
- angoumois grain moth — a gelechiid moth, Sitotroga cerealella, the larvae of which feed on stored corn and other grains.
- angular acceleration — the rate of change of angular velocity
- animal liberationist — a person who campaigns for animal rights, often by using direct action
- anniversary reaction — a psychological reaction, as depression, occurring at a regularly fixed time and associated with the recollection of an emotionally upsetting past experience, as loss of a loved one.
- anthemius of tralles — c474–c534, Greek mathematician and architect, active in Lydia.
- anthropomorphization — Endowing with human qualities.
- anti-corn law league — an organization founded in 1839 by Richard Cobden and John Bright to oppose the Corn Laws, which were repealed in 1846
- antiauthoritarianism — Opposition to authority; the quality of being antiauthoritarian.
- antidandruff shampoo — a shampoo that prevents or treats dandruff
- antidiuretic hormone — vasopressin. Abbreviation: ADH.
- antifriction bearing — a roller bearing or ball bearing.
- antigestational drug — a drug that averts a pregnancy by preventing the fertilized egg from becoming implanted in the uterine wall.
- antimony oxychloride — a white, water-insoluble powder, SbOCl, used chiefly in the manufacture of antimony salts.
- antimony trifluoride — a white to grayish-white, crystalline, hygroscopic, water-soluble, poisonous solid, SbF 3 , used chiefly in dyeing textiles.
- antony and cleopatra — a tragedy (1606–07?) by Shakespeare.
- aortic insufficiency — abnormal closure of the aortic valve resulting in regurgitation of blood to the left ventricle.
- apothecaries' weight — a system of weights, formerly used in pharmacy, based on the Troy ounce, which contains 480 grains. 1 grain is equal to 0.065 gram
- apparent candlepower — a measure of the luminous intensity of an extended source of light in terms of the candlepower of a point source of light that has an equivalent luminous intensity when placed at the same distance as the extended source.
- apple computer, inc. — (company) Manufacturers of the Macintosh range of personal computers as well as the earlier Apple I, Apple II and Lisa. Founded on 1 April 1976 by Steve Jobs and Steve Wozniak. Apples were among the first microcomputers. They originally used the 6502 processor and are still being made (August 1994), now using the 65816. The Apple II line, which includes the Apple I, is the longest existing line of microcomputers. Steve Jobs left Apple (involuntarily) and started NeXT and later returned when Apple bought NeXT in late 1997(?). Quarterly sales $2150M, profits $138M (Aug 1994). http://apple.com/.
- application software — software designed for a specific need or purpose
- applications program — a program that is written and designed for specific needs or purposes
- arbitration tribunal — a tribunal set up to settle a dispute by arbitration
- arches national park — a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km).
- architectural bronze — a brass alloy of about 57 percent copper, 41 percent zinc, and 2 percent lead.
- argument from design — the argument for the existence of God based on the assumption that order in the universe implies an orderer and cannot be a natural feature of the universe.
- aristarchus of samos — 3rd century bc, Greek astronomer who anticipated Copernicus in advancing the theory that the earth revolves around the sun
- arrested development — physical development that is not complete
- articulatory feature — a property of a speech sound based on its voicing or on its place or manner of articulation in the vocal tract, as voiceless, bilabial, or stop used in describing the sound (p).
- artificial harmonics — harmonics of a note produced on a stringed instrument by lightly touching a stopped sounded string.
- artificial selection — a process in the breeding of animals and in the cultivation of plants by which the breeder chooses to perpetuate only those forms having certain desirable inheritable characteristics.
- asexual reproduction — reproduction, as budding, fission, or spore formation, not involving the union of gametes.
- asian tiger mosquito — a mosquito, Aedes albopictus, native to Asia, that transmits yellow fever and dengue and possibly West Nile virus. Compare yellow-fever mosquito.
- assessment procedure — an established method of assessing students or workers
- asset turnover ratio — An asset turnover ratio is a measure of the efficiency of a company, that is calculated by dividing sales for a period by average total assets.
- association of stars — a sparsely populated group of between 10 and 1000 young stars of similar spectral type and common origin that are moving too fast to form a permanent, gravitationally bound system.
- astatic galvanometer — a galvanometer that is unaffected by the earth's magnetic field and is used for measuring small currents.
- at one's finger tips — the tip or end of a finger.
- at someone's service — ready to serve or cooperate with someone
- at the crack of dawn — If you say that someone does something at the crack of dawn, you are emphasizing that they do it very early in the morning.
- at the drop of a hat — If you say that you are ready to do something at the drop of a hat, you mean that you are willing to do it immediately, without hesitating.
- at the eleventh hour — at the last moment; just before it is too late
- at two hours' notice — with notification only two hours in advance
- atmospheric pressure — Atmospheric pressure is the pressure of the atmosphere on the Earth's surface.
- attic salt (or wit) — graceful, piercing wit
- automobile insurance — Automobile insurance is insurance coverage for cars.
- auxiliary power unit — an additional engine fitted to an aircraft to operate when the main engines are not in use
- axiomatic set theory — (theory) One of several approaches to set theory, consisting of a formal language for talking about sets and a collection of axioms describing how they behave. There are many different axiomatisations for set theory. Each takes a slightly different approach to the problem of finding a theory that captures as much as possible of the intuitive idea of what a set is, while avoiding the paradoxes that result from accepting all of it, the most famous being Russell's paradox. The main source of trouble in naive set theory is the idea that you can specify a set by saying whether each object in the universe is in the "set" or not. Accordingly, the most important differences between different axiomatisations of set theory concern the restrictions they place on this idea (known as "comprehension"). NBG (von Neumann-Bernays-Goedel) set theory sort of allows comprehension for all formulae without restriction, but distinguishes between two kinds of set, so that the sets produced by applying comprehension are only second-class sets. NBG is exactly as powerful as ZF, in the sense that any statement that can be formalised in both theories is a theorem of ZF if and only if it is a theorem of ZFC. MK (Morse-Kelley) set theory is a strengthened version of NBG, with a simpler axiom system. It is strictly stronger than NBG, and it is possible that NBG might be consistent but MK inconsistent. ML ("Modern Logic") is to NF as NBG is to ZF. (Its name derives from the title of the book in which Quine introduced an early, defective, form of it). It is stronger than ZF (it can prove things that ZF can't), but if NF is consistent then ML is too.