18-letter words containing a, r, i, e, l
- the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
- the internationale — a revolutionary socialist hymn, first sung in 1871 in France
- the masurian lakes — a group of lakes in Masuria in NE Poland: scene of Russian defeats by the Germans (1914, 1915) during World War I
- the north atlantic — the northern part of the Atlantic Ocean, especially the waters separating North America and Europe
- the practicalities — the real facts or details of a situation, as opposed to its theoretical aspects
- the sun also rises — a novel (1926) by Ernest Hemingway.
- the-cocktail-party — a play in verse (1950) by T. S. Eliot.
- the-master-builder — a play (1892) by Ibsen.
- theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
- thermal efficiency — the ratio of the work output of a heat engine to the heat input expressed in the same units of energy.
- thorfinn karlsefni — 980–after 1007, Icelandic navigator, explorer, and leader of early colonizing expedition to Vinland, in North America.
- timber rattlesnake — a rattlesnake, Crotalus horridus horridus, of the eastern U.S., usually having the body marked with dark crossbands.
- to play favourites — to display favouritism
- to raise the alarm — If you raise the alarm or sound the alarm, you warn people of danger.
- to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
- traditional weapon — a weapon having ceremonial tribal significance, such as an assegai or knobkerrie
- traffic controller — a person whose job is to control the flow of air traffic
- tranquillizer dart — a dart filled with a tranquillizer that is shot from a gun in order to temporarily sedate an animal so that it may be handled safely
- transit theodolite — a theodolite having a telescope that can be transited.
- transition element — any element in any of the series of elements with atomic numbers 21–29, 39–47, 57–79, and 89–107, that in a given inner orbital has less than a full quota of electrons.
- translation agency — an organization that provide people to translate speech or writing into a different language
- traveling salesman — a male representative of a business firm who travels in an assigned territory soliciting orders for a company's products or services.
- travelling library — a mobile library in which a vehicle such as a van delivers books to be borrowed
- treaty obligations — obligations or duties that must be carried out by a party as according to a treaty they have entered into
- triangle of forces — a triangle whose sides represent the magnitudes and directions of three forces whose resultant is zero and which are therefore in equilibrium
- triarylmethane dye — any of the class of dyes containing three aryl groups attached to a central carbon atom: used chiefly for dyeing cotton, wool, and silk.
- trickle irrigation — drip irrigation.
- tristan und isolde — a music drama (composed, 1857–59; première, 1865) by Richard Wagner.
- tristimulus values — three values that together are used to describe a colour and are the amounts of three reference colours that can be mixed to give the same visual sensation as the colour considered
- trobriand islander — a native or inhabitant of the Trobriand Islands of Papua New Guinea
- turbine ventilator — a ventilator, usually mounted on the roof of a building, deck of a ship, etc., having at its head a globular, vaned rotor that is rotated by the wind, conveying air through a duct to and from a chamber below.
- ulcerative colitis — chronic ulceration in the large intestine, characterized by painful abdominal cramps and profuse diarrhea containing pus, blood, and mucus.
- ultrasonic testing — the scanning of material with an ultrasonic beam, during which reflections from faults in the material can be detected: a powerful nondestructive test method
- ultrasonic welding — the use of high-energy vibration of ultrasonic frequency to produce a weld between two components which are held in close contact
- ultraviolet filter — a filter used on a lens to absorb ultraviolet radiation that may impart an undesirable blue cast to a photograph.
- unilateral neglect — a symptom of brain damage in which a person is unaware of one side of his or her body and of anything in the external world on the same side
- universal coupling — a coupling between rotating shafts set at an angle to one another, allowing for rotation in three planes.
- universal debugger — (tool, parallel) (udb) KSR's interactive source level debugger for serial and parallel programs written in KSR, Fortran, KSR C and KSR1 assembly language. Udb is a source level debugger for testing and debugging serial and parallel programs; it is compatible with GDB and dbx. The user can direct udb either by typing commands or graphically through an X-based window interface; the latter provides simultaneous display of source code, I/O and instructions. For parallel programs, operations can be carried out per-thread.
- universal language — an auxiliary language that is used and understood everywhere.
- universal negative — a proposition of the form “No S is P.” Symbol: E, e.
- universal suffrage — suffrage for all persons over a certain age, usually 18 or 21, who in other respects satisfy the requirements established by law.
- universalizability — the thesis that any moral judgment must be equally applicable to every relevantly identical situation
- university faculty — a division within a university comprising one subject area, or a number of related subject areas
- unix international — (body) (UI) A consortium including Sun, AT&T and others formed to promote an open environment based on Unix System V, including the Open Look windowing system.
- upper middle class — wealthy, highly-educated people
- upper palaeolithic — the latest of the three periods of the Palaeolithic, beginning about 40 000 bc and ending, in Europe, about 12 000 bc: characterized by the emergence of modern man, Homo sapiens
- upper partial tone — overtone (def 1).
- venture capitalist — funds invested or available for investment in a new or unproven business enterprise.
- vicar of wakefield — a novel (1766) by Goldsmith.
- victor emmanuel ii — 1820–78, king of Sardinia 1849–78; first king of Italy 1861–78.