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

  • community hospital — (in the US) a local hospital
  • community language — a language spoken by members of a minority group or community within a majority language context
  • complementary base — either of the nucleotide bases linked by a hydrogen bond on opposite strands of DNA or double-stranded RNA: guanine is the complementary base of cytosine, and adenine is the complementary base of thymine in DNA and of uracil in RNA.
  • complementary gene — one of a pair of genes, each from different loci, that together are required for the expression of a certain characteristic
  • complexity measure — (algorithm)   A quantity describing the complexity of a computation.
  • continental system — French system.
  • 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.
  • 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
  • crystal oscillator — a clear, transparent mineral or glass resembling ice.
  • 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.
  • cultural sociology — the study of the origins and development of societal institutions, norms, and practices.
  • 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.
  • data flow analysis — (programming)   A process to discover the dependencies between different data items manipulated by a program. The order of execution in a data driven language is determined solely by the data dependencies. For example, given the equations 1. X = A + B 2. B = 2 + 2 3. A = 3 + 4 a data-flow analysis would find that 2 and 3 must be evaluated before 1. Since there are no data dependencies between 2 and 3, they may be evaluated in any order, including in parallel. This technique is implemented in hardware in some pipelined processors with multiple functional units. It allows instructions to be executed as soon as their inputs are available, independent of the original program order.
  • 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.
  • dialytic telescope — a type of achromatic telescope with a second correcting lens
  • dictionary catalog — a library catalog having all its entries, including authors, titles, subjects, etc., in one general alphabetical sequence.
  • dietary supplement — a substance taken in addition to what you eat in order to promote health
  • 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.
  • 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
  • display postscript — An extended form of PostScript permitting its interactive use with bitmap displays.
  • disproportionality — not in proportion; disproportionate.
  • disproportionately — not proportionate; out of proportion, as in size or number.
  • distinguishability — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
  • dysfunctionalities — Plural form of dysfunctionality.
  • 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
  • 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
  • family-tree theory — a theory that describes language change in terms of genetically related languages developing in successive splits from a common parent language, such as Indo-European, as depicted by a family tree diagram.
  • fantasy basketball — imagination, especially when extravagant and unrestrained.
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