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18-letter words containing l, e, y, t

  • corpuscular theory — the theory, originally proposed by Newton, and revived with the development of the quantum theory, that light consists of a stream of particles
  • countercyclicality — The quality of being countercyclical.
  • counterintuitively — In a manner contrary to intuition or common sense.
  • cranial osteopathy — osteopathy that focuses on the cranium and the spine
  • credibility rating — a supposed measure of how far a person can be believed or trusted
  • crested flycatcher — any of various tyrant flycatchers (esp. genus Myiarchus) with a prominent crest
  • crystal microphone — a microphone that uses a piezoelectric crystal to convert sound energy into electrical energy
  • cultural diversity — the cultural variety and cultural differences that exist in the world, a society, or an institution: Dying languages and urbanization are threats to cultural diversity.
  • cycle of indiction — indiction (def 3).
  • cycle-of-indiction — a proclamation made every 15 years in the later Roman Empire, fixing the valuation of property to be used as a basis for taxation.
  • cyclic pitch lever — a lever in a helicopter to change the angle of attack of individual rotor blades, causing the helicopter to move forwards, backwards, or sideways
  • cyclopean concrete — concrete containing stones larger than 6 inches (15 cm).
  • daisywheel printer — (printer)   A kind of impact printer where the characters are arranged on the ends of the spokes of a wheel (resembling the petals on a daisy). The wheel (usually made of plastic) is rotated to select the character to print and then an electrically operated hammer mechanism bends the selected spoke forward slightly, sandwiching an ink ribbon between the character and the paper, as in a typewriter. One advantage of this arrangement over that of a typewriter is that different wheels may be inserted to produce different typefaces.
  • daytime television — television broadcasts that are shown during the daytime rather than in the evening
  • death by chocolate — a very rich type of chocolate dessert or cake
  • death-valley curve — a curve on a graph showing how the capital of a new company plotted against time declines sharply as the venture capital is used up before income reaches predicted levels
  • deferred liability — income received in advance and carried forward as a liability until the associated goods, services, or benefits are delivered
  • depository library — a library designated by law to receive without charge all or a selection of the official publications of a government.
  • developing country — a nonindustrialized poor country that is seeking to develop its resources by industrialization
  • development system — a computer system, including hardware and software, that is specifically designed to aid in the development of software and interfaces
  • dialytic telescope — a type of achromatic telescope with a second correcting lens
  • dietary supplement — a substance taken in addition to what you eat in order to promote health
  • diethylstilbestrol — a nonsteroidal synthetic estrogen, C 18 H 20 O 2 , used in medicine chiefly in the treatment of menopausal symptoms and in animal feeds for chemical caponization: formerly used during pregnancy for the prevention of miscarriage but discontinued owing to its association with an increased risk of vaginal and cervical cancers in women having had fetal exposure. Abbreviation: DES.
  • digital technology — the branch of scientific or engineering knowledge that deals with the creation and practical use of digital or computerized devices, methods, systems, etc.: advances in digital technology.
  • dihydrotachysterol — a white, crystalline, water-insoluble sterol, C 28 H 46 O, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
  • dimethyl sulfoxide — DMSO.
  • dimethylsulphoxide — a colourless odourless liquid substance used as a solvent and in medicine as an agent to improve the penetration of drugs applied to the skin. Formula: (CH3)2SO
  • dimethyltryptamine — a hallucinogenic drug, C 12 H 16 N 2 , with an action of short duration. Abbreviation: DMT.
  • diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
  • disability pension — a pension paid to people who are unable to continue to work because of a disability
  • disorderly conduct — any of various petty misdemeanors, generally including nuisances, breaches of the peace, offensive or immoral conduct in public, etc.
  • disproportionately — not proportionate; out of proportion, as in size or number.
  • doubly linked list — (programming)   A data structure in which each element contains pointers to the next and previous elements in the list, thus forming a bidirectional linear list.
  • dysfunctionalities — Plural form of dysfunctionality.
  • eighty-column mind — (abuse)   The sort said to be possessed by persons for whom the transition from punched card to paper tape was traumatic (nobody has dared tell them about disks yet). It is said that these people, including (according to an old joke) the founder of IBM, will be buried "face down, 9-edge first" (the 9-edge being the bottom of the card). This directive is inscribed on IBM's 1402 and 1622 card readers and is referenced in a famous bit of doggerel called "The Last Bug", the climactic lines of which are as follows: He died at the console Of hunger and thirst. Next day he was buried, Face down, 9-edge first. The eighty-column mind is thought by most hackers to dominate IBM's customer base and its thinking. See fear and loathing, card walloper.
  • eighty-twenty rule — (programming)   The program-design version of the law of diminishing returns. The 80/20 rule says that roughly 80% of the problem can be solved with 20% of the effort that it would take to solve the whole problem. For example, parsing e-mail addresses in "From:" lines in e-mail messages is notoriously difficult if you follow the RFC 2822 specification. However, about 60% of actual "From:" lines are in the format "From: Their Name <[email protected]>", with a far more constrained idea of what can be in "user" or "host" than in RFC 2822. Another 25% just add double-quotes around "Their Name". Matching just those two patterns would thus cover 85% of "From:" lines, with a tiny portion of the code required to fully implement RFC2822. (Adding support for "From: [email protected]" and "From: [email protected] (Their Name) " brings coverage to almost 100%, leaving only really baroque things that RFC-2822 permits, like "From: Pete(A wonderful \) chap)
  • electricity strike — a time when workers at an electricity company stop supplying power as a protest at working conditions
  • electrocyclization — (organic chemistry) an electrocyclic reaction.
  • electrodynamometer — An instrument that measures electric current by indicating the strength of repulsion or attraction between the magnetic fields of two sets of coils, one fixed and one movable.
  • electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
  • elementary student — primary school pupil
  • elementary teacher — a teacher in an elementary school
  • emotional literacy — the ability to deal with one's emotions and recognize their causes
  • employment service — (in the United States) a government department established to collect and supply to the unemployed information about job vacancies and to employers information about availability of prospective workers
  • enantioselectivity — (chemistry) The selectivity of a reaction towards one of a pair of enantiomers.
  • ethnopsychological — Relating to ethnopsychology.
  • evolution strategy — (ES) A kind of evolutionary algorithm where individuals (potential solutions) are encoded by a set of real-valued "object variables" (the individual's "genome"). For each object variable an individual also has a "strategy variable" which determines the degree of mutation to be applied to the corresponding object variable. The strategy variables also mutate, allowing the rate of mutation of the object variables to vary. An ES is characterised by the population size, the number of offspring produced in each generation and whether the new population is selected from parents and offspring or only from the offspring. ES were invented in 1963 by Ingo Rechenberg, Hans-Paul Schwefel at the Technical University of Berlin (TUB) while searching for the optimal shapes of bodies in a flow.
  • eyeball to eyeball — If you are eyeball to eyeball with someone, you are in their presence and involved in a meeting, dispute, or contest with them. You can also talk about having an eyeball to eyeball meeting or confrontation.
  • fallot's tetralogy — a congenital heart disease in which there are four defects: pulmonary stenosis, enlarged right ventricle, a ventricular septal defect, and an aorta whose origin lies over the septal defect. In babies suffering this disease the defects can be corrected by surgery
  • family-size packet — a packet large enough to be suitable for a family
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