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18-letter words containing d, i, r, u, m

  • logarithmus dualis — (mathematics)   (ld) Latin for logarithm base two. More commonly written as "log" with a subscript "2". Roughly the number of bits required to represent an integer.
  • loschmidt's number — the number of molecules in one cubic centimeter of an ideal gas at standard temperature and pressure, equal to 2.687 × 10 19.
  • magnesium peroxide — a white, tasteless, water-insoluble powder, MgO 2 , used as an antiseptic and as an oxidizing and bleaching agent.
  • marine underwriter — an underwriter who specializes in marine insurance
  • marsilius of padua — c1280–1343? Italian scholar and political theorist.
  • mercurous chloride — calomel.
  • mercury delay line — (storage, history)   An archaic first-in first-out fixed time period data storage device using acoustic transducers to transmit data as waves in a trough or tube of mercury. EDSAC (Cambridge) and UNIVAC I used delay lines.
  • middleburg heights — a town in N Ohio.
  • milkweed butterfly — monarch butterfly.
  • misunderestimation — (nonstandard) An inaccurate underestimation, or an act of misunderestimating.
  • mixed-flow turbine — a water turbine in which water flows radially and axially through the rotating vanes
  • modular arithmetic — arithmetic in which numbers that are congruent modulo a given number are treated as the same. Compare congruence (def 2), modulo, modulus (def 2b).
  • modulus of torsion — a coefficient of elasticity of a substance, expressing the ratio between the force per unit area (shearing stress) that laterally deforms the substance and the shear (shearing strain) that is produced by this force.
  • molecular medicine — the study of disease or injury at the molecular or cellular level.
  • mordovian republic — a constituent republic of W central Russia, in the middle Volga basin. Capital: Saransk. Pop: 888 700 (2002). Area: 26 200 sq km (10 110 sq miles)
  • mucopolysaccharide — (formerly) glycosaminoglycan.
  • multi-user dungeon — Multi-User Dimension
  • national guardsman — guardsman (def 2).
  • neuropsychodynamic — Of or pertaining to neuropsychodynamics.
  • nonstriated muscle — smooth muscle
  • numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
  • order of magnitude — You can use order of magnitude when you are giving an approximate idea of the amount or importance of something.
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
  • potassium fluoride — a white, crystalline, hygroscopic, toxic powder, KF, used chiefly as an insecticide, a disinfectant, and in etching glass.
  • production company — an organization which produces, films, plays, television or radio programmes
  • production manager — a supervisor of the budget, crew and other details in the production of a film or play
  • pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
  • pyromucic aldehyde — furfural.
  • quartz-iodine lamp — a type of tungsten-halogen lamp containing small amounts of iodine and having a quartz envelope, operating at high temperature and producing an intense light for use in car headlamps, etc
  • quinacrine mustard — a nitrogen mustard derived from mepacrine and used as a stain for chromosomes
  • radiocommunication — communication by means of radio waves
  • red mercuric oxide — a slightly crystalline, water-soluble, poisonous compound, HgO, occurring as a coarse, orange-red powder (red mercuric oxide) or as a fine, orange-yellow powder (yellow mercuric oxide) used chiefly as a pigment in paints and as an antiseptic in pharmaceuticals.
  • residual magnetism — remanence.
  • rheims-douay bible — Douay Bible.
  • rufous hummingbird — a reddish-brown hummingbird, Selasphorus rufus, of western North America.
  • run length limited — (storage)   (RLL) The most popular scheme for encoding data on magnetic disks. RLL packs up to 50% more data on a disk than MFM. Groups of bits are mapped to specific patterns of flux. The density of flux transitions is limited by the spatial resolution of the disk and frequency response of the head and electronics. However, transitions must be close enough to allow reliable clock recovery. RLL implementations vary according to the minimum and maximum allowed numbers of transition cells between transitions. For example, the most common variant today, RLL 1,7, can have a transition in every other cell and must have at least one transition every seven cells. The exact mapping from bits to transitions is essentially arbitrary. Other schemes include GCR, FM, Modified Frequency Modulation (MFM). See also: PRML.
  • second triumvirate — the coalition and joint rule of the Roman Empire by Antony, Lepidus, and Octavian, begun in 43 bc
  • simone de beauvoir — Simone [see-mawn] /siˈmɔn/ (Show IPA), (Lucie Ernestine Marie Bertrand) 1908–86, French playwright, novelist, and essayist.
  • sodium bicarbonate — a white, crystalline, water-soluble solid, in powder or granules, NaHCO 3 , usually prepared by the reaction of soda ash with carbon dioxide or obtained from the intermediate product of the Solvay process by purification: used chiefly in the manufacture of sodium salts, baking powder, and beverages, as a laboratory reagent, as a fire extinguisher, and in medicine as an antacid.
  • sodium tetraborate — borax1 .
  • sodium-vapour lamp — a type of electric lamp consisting of a glass tube containing neon and sodium vapour at low pressure through which an electric current is passed to give an orange light. They are used in street lighting
  • squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
  • strontium monoxide — a white insoluble solid substance used in making strontium salts and purifying sugar. Formula: SrO
  • submarine sandwich — a sandwich made with a long cylindrical bread roll
  • submaxillary gland — submandibular gland.
  • subsidiary company — a company whose controlling interest is owned by another company.
  • summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
  • sun-dried tomatoes — tomatoes that have been dried or preserved by exposure to the sun
  • super middleweight — a boxer weighing up to 168 pounds (75.6 kg), between middleweight and light heavyweight.
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