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19-letter words containing d, i, l, u

  • olive-backed thrush — Swainson's thrush.
  • optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
  • parliament building — structure housing legislative offices
  • percussion drilling — Percussion drilling is a drilling method which involves lifting and dropping heavy tools to break rock, and uses steel casing tubes to stop the borehole from collapsing.
  • peroxysulfuric acid — persulfuric acid (def 1).
  • perpetual adoration — uninterrupted adoration of the Blessed Sacrament.
  • police headquarters — building where police are stationed
  • preproduction model — a prototype of a product before the product goes into full-scale production
  • preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
  • priority scheduling — (operating system)   Processes scheduling in which the scheduler selects tasks to run based on their priority as opposed to, say, a simple round-robin. Priorities may be static or dynamic. Static priorities are assigned at the time of creation, while dynamic priorities are based on the processes' behaviour while in the system. For example, the scheduler may favour I/O-intensive tasks so that expensive requests can be issued as early as possible. A danger of priority scheduling is starvation, in which processes with lower priorities are not given the opportunity to run. In order to avoid starvation, in preemptive scheduling, the priority of a process is gradually reduced while it is running. Eventually, the priority of the running process will no longer be the highest, and the next process will start running. This method is called aging.
  • production platform — offshore power station
  • profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
  • pseudo-biographical — of or relating to a person's life: He's gathering biographical data for his book on Milton.
  • pseudo-experimental — pertaining to, derived from, or founded on experiment: an experimental science.
  • pseudo-hieroglyphic — noting or pertaining to a script dating from the second millennium b.c. that appears to be syllabic and to represent the Phoenician language and that is inscribed on objects found at Byblos.
  • pseudo-intellectual — a person exhibiting intellectual pretensions that have no basis in sound scholarship.
  • pseudo-professional — following an occupation as a means of livelihood or for gain: a professional builder.
  • pseudopsychological — of or relating to psychology.
  • queensland lungfish — a lungfish, Neoceratodus forsteri, reaching a length of six feet: occurs in Queensland rivers but introduced elsewhere
  • radioactive fallout — the settling to the ground of airborne particles ejected into the atmosphere from the earth by explosions, eruptions, forest fires, etc., especially such settling from nuclear explosions (radioactive fallout) Compare rainout.
  • radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • regular icosahedron — an icosahedron in which each of the faces is an equilateral triangle
  • reindustrialization — the revitalization of an industry or industrial society through government aid and tax incentives, modernization of factories and machinery, etc.
  • religious education — religion as school subject
  • republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
  • reticulated tracery — tracery consisting in large part of a netlike arrangement of repeated geometrical figures.
  • reticuloendothelial — pertaining to, resembling, or involving cells of the reticuloendothelial system.
  • right-eyed flounder — any of several flatfishes of the family Pleuronectidae, having both eyes on the right side of the head.
  • run-length encoding — A kind of compression algorithm which replaces sequences ("runs") of consecutive repeated characters (or other units of data) with a single character and the length of the run. This can either be applied to all input characters, including runs of length one, or a special character can be used to introduce a run-length encoded group. The longer and more frequent the runs are, the greater the compression that will be achieved. This technique is particularly useful for encoding black and white images where the data units would be single bit pixels.
  • rural free delivery — former name for rural delivery service. Abbreviation: R.F.D.
  • samuel de champlain — Samuel de [sam-yoo-uh l duh;; French sa-my-el duh] /ˈsæm yu əl də;; French sa müˈɛl də/ (Show IPA), 1567–1635, French explorer in the Americas: founder of Quebec; first colonial governor 1633–35.
  • screen actors guild — a labor union for motion-picture performers, founded in 1933. Abbreviation: SAG.
  • secondary qualities — one of the qualities attributed by the mind to an object perceived, such as color, temperature, or taste.
  • semiconductor laser — a laser in which a semiconductor is the light-emitting source, used in many medical procedures.
  • sexual reproduction — reproduction involving the union of gametes.
  • sharp-tailed grouse — a grouse, Pedioecetes phasianellus, of prairies and open forests of western North America, similar in size to the prairie chicken but with a more pointed tail.
  • sidereal hour angle — the angle, measured westward through 360°, between the hour circle passing through the vernal equinox and the hour circle of a celestial body.
  • simple closed curve — a curve that is closed and that has no loops or points missing; a curve for which there exists a homeomorphism mapping it to a circle.
  • sir wilfrid laurier — Sir Wilfrid [wil-frid;; French weel-freed] /ˈwɪl frɪd;; French wilˈfrid/ (Show IPA), 1841–1919, Canadian statesman: prime minister 1896–1911.
  • sodium hydrosulfite — a white, crystalline, water-soluble powder, Na 2 S 2 O 4 , used as a reducing agent, especially in dyeing, and as a bleach.
  • sodium hypochlorite — a pale-green, crystalline compound, NaOCl, unstable in air, soluble in cold water, decomposes in hot water: used as a bleaching agent for paper and textiles, in water purification, in household use, and as a fungicide.
  • sodium metasilicate — a white, granular sodium silicate, Na 2 SiO 3 , soluble in water: used in detergents and in bleaching and cleaning products.
  • sodium thiosulphate — a white soluble substance used, in the pentahydrate form, in photography as a fixer to dissolve unchanged silver halides and also to remove excess chlorine from chlorinated water. Formula: Na2S2O3
  • solid of revolution — a three-dimensional figure formed by revolving a plane area about a given axis.
  • specialized subject — a school or university subject that concentrates on a particular field of knowledge
  • strangulated hernia — a hernia, especially of the intestine, that swells and constricts the blood supply of the herniated part, resulting in obstruction and gangrene.
  • subjective idealism — a doctrine that the world has no existence independent of sensations or ideas.
  • submandibular gland — either of a pair of salivary glands located one on each side of and beneath the lower jaw.
  • sulphonium compound — any one of a class of salts derived by the addition of a proton to the sulphur atom of a thiol or thio-ether thus producing a positive ion (sulphonium ion)
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