18-letter words containing y, e, l, p
- aerial photography — Aerial photography is the process of taking photographs of an area from above, for example from an airplane or mast.
- algebraic topology — the branch of mathematics that deals with the application of algebraic methods to topology, especially the study of homology and homotopy.
- apocryphal gospels — accounts of Christ's life that are not recognized as part of the New Testament
- apparent solar day — the period of time between two successive passages of the sun's center across the same meridian.
- apple of one's eye — a person or thing that is very precious or much loved
- applied psychology — psychology that is put to practical use
- bachelorette party — A bachelorette party is a party for a woman who is getting married very soon, to which only women are invited.
- beta-naphthylamine — a white to reddish, crystalline, water-soluble, extremely toxic solid, C 10 H 9 N, used chiefly in the manufacture of azo dyes.
- biological therapy — biotherapy
- boundedly complete — (theory) (Or "consistently complete") In domain theory, a complete partial order is boundedly complete if every bounded subset has a least upper bound.
- byte-code compiler — (programming, tool) A compiler which outputs a program in some kind of byte-code. Compare: byte-code interpreter.
- chemical pregnancy — a pregnancy that is confirmed by a pregnancy test but not by clinical signs and terminates before clinical signs can be observed.
- color transparency — a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection.
- 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.
- computer telephony — Computer Telephone Integration
- 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
- cranial osteopathy — osteopathy that focuses on the cranium and the spine
- creeping paralysis — any slow process that causes a system, government, etc, to stop working efficiently
- crystal microphone — a microphone that uses a piezoelectric crystal to convert sound energy into electrical energy
- currency principle — the principle that banks should be permitted to issue notes only against bullion or coin.
- 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.
- decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
- 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
- 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
- disproportionately — not proportionate; out of proportion, as in size or number.
- domremy-la-pucelle — a village in Lorraine, NE France, SW of Nancy: birthplace of Joan of Arc.
- dry-powder inhaler — A dry-powder inhaler is a device that delivers medication to the lungs in the form of a dry powder.
- dynamically scoped — dynamic scope
- electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
- 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
- epicycloidal wheel — one of the planetary gears of an epicyclic train
- ethnopsychological — Relating to ethnopsychology.
- family-size packet — a packet large enough to be suitable for a family
- farmer-labor party — a political party in Minnesota, founded in 1920 and merged with the Democratic Party in 1944.
- flat-panel display — a type of thin, lightweight video display that uses liquid crystals or electroluminescence to reflect images.
- free-range poultry — poultry kept in natural nonintensive conditions
- gainful employment — an occupation that pays an income
- gestalt psychology — (sometimes lowercase) the theory or doctrine that physiological or psychological phenomena do not occur through the summation of individual elements, as reflexes or sensations, but through gestalts functioning separately or interrelatedly.
- golden opportunity — perfect chance
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