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20-letter words containing a, n

  • alcoholics anonymous — an association of alcoholics who try, esp by mutual assistance, to overcome alcoholism
  • alexandra feodorovna — 1872–1918, empress of Russia (wife of Nicholas II).
  • alfred hermann fried — Alfred Hermann [al-frid hur-muh n;; German ahl-freyt her-mahn] /ˈæl frɪd ˈhɜr mən;; German ˈɑl freɪt ˈhɛr mɑn/ (Show IPA), 1864–1921, Austrian writer and journalist: Nobel Peace Prize 1911.
  • algebraic expression — a symbol or a combination of symbols used in algebra, containing one or more numbers, variables, and arithmetic operations: how to solve algebraic expressions.
  • algorithmic language — ALGOL 60
  • alkaline earth metal — any of the divalent electropositive metals beryllium, magnesium, calcium, strontium, barium, and radium, belonging to group 2A of the periodic table
  • alkaline phosphatase — a phosphatase active in an alkaline medium.
  • alkaline-earth metal — any of the group of bivalent metals including barium, radium, strontium, calcium, and, usually, magnesium, the hydroxides of which are alkalis but less soluble than those of the alkali metals.
  • all-ordinaries index — an index of share prices on the Australian Stock Exchange giving a weighted arithmetic average of 245 ordinary shares
  • alpha-naphthyl group — naphthyl group (def 1).
  • alternative comedian — someone who practises alternative comedy
  • alternative medicine — treatments: homeopathic
  • alternative question — a question that offers the listener a choice of two or more alternatives and is characterized by rising intonation on each alternative except for the final one, which has falling intonation, as Would you like coffee, tea, or soda?
  • aluminum borohydride — a volatile liquid, Al(BH 4) 3 , that ignites spontaneously in air and reacts vigorously with water to form hydrogen, used chiefly in organic synthesis.
  • amana church society — a Christian community in Iowa governed by elders, with no ordained clergy: founded in Germany in 1714, in America since 1843
  • ambient air standard — the highest concentration of a specific air pollutant at a particular outdoor location, in a specified unit of time, that is not considered hazardous to humans: The ambient air standard for gas X is 3 parts per million per hour.
  • ambulatory care unit — a part of hospital where treatment is given to non-resident patients
  • amelia jenks bloomer — Amelia Jenks [jengks] /dʒɛŋks/ (Show IPA), 1818–94, U.S. social reformer and women's-rights leader.
  • american globeflower — a plant, Trollius laxus, of the buttercup family, of the northeastern and Great Lakes coastal areas of the U.S., having solitary, yellowish-green flowers.
  • american labor party — a U.S. political party (1936–56) organized in New York City to gain independent political status for the labor and liberal factions of the Democratic Party.
  • ammonium bicarbonate — a white, crystalline, water-soluble solid, NH 4 HCO 3 , used chiefly in the manufacture of baking powder.
  • ammonium chrome alum — chrome alum (def 1).
  • ammonium thiocyanate — a colorless, crystalline, deliquescent, water-soluble solid, CH 4 N 2 S, used chiefly as a herbicide and as a fixative in textile printing.
  • ammonium thiosulfate — a white, crystalline, water-soluble solid, (NH 4) 2 S 2 O 3 , used chiefly in the manufacture of cleaning compounds for alloys having a tin or lead base.
  • amplitude modulation — one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal
  • ampulla of lorenzini — any of an array of electroreceptors in the head of sharks, skates, and rays capable of detecting weak electrical signals produced by muscular activity in other creatures.
  • analysis of variance — any of a number of techniques for resolving the observed variance between sets of data into components, esp to determine whether the difference between two samples is explicable as random sampling variation with the same underlying population
  • analytical chemistry — a branch of chemistry that deals with the identification of compounds and mixtures (qualitative analysis) or the determination of the proportions of the constituents (quantitative analysis): techniques commonly used are titration, precipitation, spectroscopy, chromatography, etc.
  • anatomical pathology — the branch of pathology dealing with the morphologic changes in the tissues, both gross and microscopic; pathological anatomy.
  • anatomically correct — having representations of the sexual organs: An anatomically correct doll was shown to the witness.
  • anglo-egyptian sudan — territory jointly administered by Egypt & Great Britain (1899-1956)
  • anglo-venetian glass — glassware made in England from the late 16th to the late 17th centuries in imitation of Venetian models.
  • angoumois grain moth — a gelechiid moth, Sitotroga cerealella, the larvae of which feed on stored corn and other grains.
  • angular acceleration — the rate of change of angular velocity
  • angular displacement — the angle through which a point, line, or body is rotated about a specific axis in a given direction
  • animal liberationist — a person who campaigns for animal rights, often by using direct action
  • anniversary reaction — a psychological reaction, as depression, occurring at a regularly fixed time and associated with the recollection of an emotionally upsetting past experience, as loss of a loved one.
  • anomalous dispersion — a sudden change in the refractive index of a material for wavelengths in the vicinity of absorption bands in the spectrum of the material.
  • anthemius of tralles — c474–c534, Greek mathematician and architect, active in Lydia.
  • anthropomorphization — Endowing with human qualities.
  • anti-corn law league — an organization founded in 1839 by Richard Cobden and John Bright to oppose the Corn Laws, which were repealed in 1846
  • anti-intellectualism — a feeling of hostility and dislike towards intellectuals and intellectual activities
  • anti-motion-sickness — combatting the effects of motion sickness
  • anti-supernaturalism — supernatural character or agency.
  • antiauthoritarianism — Opposition to authority; the quality of being antiauthoritarian.
  • anticrepuscular arch — antitwilight arch.
  • antidandruff shampoo — a shampoo that prevents or treats dandruff
  • antidisestablishment — Opposed to the separation of church and state.
  • antidiuretic hormone — vasopressin. Abbreviation: ADH.
  • antifriction bearing — a roller bearing or ball bearing.
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