20-letter words containing a, l, h, i
- a nail in the coffin — If you say that one thing is a nail in the coffin of another thing, you mean that it will help bring about its end or failure.
- a trick of the light — If you say that something is a trick of the light, you mean that what you are seeing is an effect caused by the way that the light falls on things, and does not really exist in the way that it appears.
- absent without leave — absent from duty without official permission but with no intention of deserting
- acetylcholinesterase — an enzyme in nerve cells that is responsible for the destruction of acetylcholine and thus for switching off excitation of the nerve
- acetylmethylcarbinol — acetoin.
- admiral of the fleet — an officer of the highest rank in the Royal Navy, equivalent to field marshal
- alcoholics anonymous — an association of alcoholics who try, esp by mutual assistance, to overcome alcoholism
- 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.
- 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.
- 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.
- ammonium chrome alum — chrome alum (def 1).
- 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.
- 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.
- anthemius of tralles — c474–c534, Greek mathematician and architect, active in Lydia.
- anticrepuscular arch — antitwilight arch.
- antidisestablishment — Opposed to the separation of church and state.
- antimony oxychloride — a white, water-insoluble powder, SbOCl, used chiefly in the manufacture of antimony salts.
- apollonius of rhodes — 3rd century bc, Greek epic poet and head of the Library of Alexandria. His principal work is the four-volume Argonautica
- appalachian dulcimer — dulcimer (def 2).
- arches national park — a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km).
- archiepiscopal cross — patriarchal cross.
- architectural bronze — a brass alloy of about 57 percent copper, 41 percent zinc, and 2 percent lead.
- artificial harmonics — harmonics of a note produced on a stringed instrument by lightly touching a stopped sounded string.
- asleep at the switch — a slender, flexible shoot, rod, etc., used especially in whipping or disciplining.
- audio-lingual method — a technique of foreign-language instruction that emphasizes audio-lingual skills over reading and writing and is characterized by extensive use of pattern practice.
- bacteriochlorophylls — Plural form of bacteriochlorophyll.
- belgian shepherd dog — a medium-sized well-proportioned dog of a breed that resembles an Alsatian in appearance and is often used as a sheepdog or a guard dog
- benzene hexachloride — a compound, C6H6Cl6, used as an insecticide
- benzyl isoamyl ether — a colorless liquid, C 12 H 18 O, used in soap perfumes.
- bigmouth buffalofish — a buffalofish, Ictiobus cyprinellus, found in central North America, characterized by a large mouth.
- biogeochemical cycle — the cycle in which nitrogen, carbon, and other inorganic elements of the soil, atmosphere, etc. of a region are converted into the organic substances of animals or plants and released back into the environment
- biological half life — Physics. the time required for one half the atoms of a given amount of a radioactive substance to disintegrate.
- biological half-life — the time required for half of a quantity of radioactive material absorbed by a living tissue or organism to be naturally eliminated
- bismarck archipelago — a group of over 200 islands in the SW Pacific, northeast of New Guinea: part of Papua New Guinea. Main islands: New Britain, New Ireland, Lavongai, and the Admiralty Islands. Chief town: Rabaul, on New Britain. Pop: 566 610 (2000). Area: 49 658 sq km (19 173 sq miles)
- black-throated diver — a diving bird, Gavia arctica, found in Europe and Asia, and a rare summer visitor to the UK
- blending inheritance — the blending of characteristics of the parents in the offspring, as in a pink flower that results from the mating of a red flower with a white one
- brachiocephalic vein — either of two major veins, formed by the merger of the subclavian and internal jugular veins, that drain blood from the head and arms.
- british thermal unit — a unit of heat in the fps system equal to the quantity of heat required to raise the temperature of 1 pound of water by 1°F. 1 British thermal unit is equivalent to 1055.06 joules or 251.997 calories
- buck's horn plantain — a Eurasian plant, Plantago coronopus, having leaves resembling a buck's horn: family Plantaginaceae
- bull in a china shop — If you say that someone rushes into a situation like a bull in a china shop, you are critical of them because they do not stop to think, and are insensitive to other people's feelings.
- calcium hypochlorite — a white, crystalline compound, Ca(OCl) 2 , used as a disinfectant and bleaching agent.
- can do sth blindfold — If you say that you can do something blindfold, you are emphasizing that you can do it easily, for example because you have done it many times before.
- carbohydrate loading — the practice of eating high amounts of carbohydrates, sometimes after a period of low carbohydrate intake, for several days immediately before competing in an athletic event, especially a marathon, in order to store glycogen in the body, thereby providing greater reserves of energy.
- carbon tetrachloride — a colourless volatile nonflammable sparingly soluble liquid made from chlorine and carbon disulphide; tetrachloromethane. It is used as a solvent, cleaning fluid, and insecticide. Formula: CCl4
- carl friedrich gauss — (person) A German mathematician (1777 - 1855), one of all time greatest. Gauss discovered the method of least squares and Gaussian elimination. Gauss was something of a child prodigy; the most commonly told story relates that when he was 10 his teacher, wanting a rest, told his class to add up all the numbers from 1 to 100. Gauss did it in seconds, having noticed that 1+...+100 = 100+...+1 = (101+...+101)/2. He did important work in almost every area of mathematics. Such eclecticism is probably impossible today, since further progress in most areas of mathematics requires much hard background study. Some idea of the range of his work can be obtained by noting the many mathematical terms with "Gauss" in their names. E.g. Gaussian elimination (linear algebra); Gaussian primes (number theory); Gaussian distribution (statistics); Gauss [unit] (electromagnetism); Gaussian curvature (differential geometry); Gaussian quadrature (numerical analysis); Gauss-Bonnet formula (differential geometry); Gauss's identity (hypergeometric functions); Gauss sums (number theory). His favourite area of mathematics was number theory. He conjectured the Prime Number Theorem, pioneered the theory of quadratic forms, proved the quadratic reciprocity theorem, and much more. He was "the first mathematician to use complex numbers in a really confident and scientific way" (Hardy & Wright, chapter 12). He nearly went into architecture rather than mathematics; what decided him on mathematics was his proof, at age 18, of the startling theorem that a regular N-sided polygon can be constructed with ruler and compasses if and only if N is a power of 2 times a product of distinct Fermat primes.
- catastrophic failure — Catastrophic failure is sudden and complete failure which cannot be put right.
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