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18-letter words containing a, c, h, r, o

  • electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
  • electrotherapeutic — Relating to electrotherapeutics.
  • euclid's algorithm — (algorithm)   (Or "Euclidean Algorithm") An algorithm for finding the greatest common divisor (GCD) of two numbers. It relies on the identity gcd(a, b) = gcd(a-b, b) To find the GCD of two numbers by this algorithm, repeatedly replace the larger by subtracting the smaller from it until the two numbers are equal. E.g. 132, 168 -> 132, 36 -> 96, 36 -> 60, 36 -> 24, 36 -> 24, 12 -> 12, 12 so the GCD of 132 and 168 is 12. This algorithm requires only subtraction and comparison operations but can take a number of steps proportional to the difference between the initial numbers (e.g. gcd(1, 1001) will take 1000 steps).
  • exchange programme — an arrangement in which people from different countries visit each other's country, perhaps to strengthen links between them or to improve foreign language skills
  • farm the long acre — to graze cows on the verge of a road
  • fifth monarchy men — (during the Commonwealth in the 17th century) a militant sect of Puritans who identified the fifth monarchy with the millennial reign of Christ and who believed they should help to inaugurate that reign by force.
  • fischer von erlach — Johann Bernhard [yaw-hahn bern-hahrt] /ˈyɔ hɑn ˈbɛrn hɑrt/ (Show IPA), 1656–1723, Austrian architect.
  • fourth commandment — “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments.
  • fracture toughness — The fracture toughness of a material is how likely it is to resist fracture.
  • gas chromatography — a chromatograph used for the separation of volatile substances.
  • genetic algorithms — genetic algorithm
  • greater pichiciego — an armadillo, Burmeisteria retusa, similar to, but larger than, a pichiciego
  • green-backed heron — a small, American heron, Butorides striatus, having glossy green wings.
  • haemorrhagic fever — any of a group of fevers, such as Ebola virus disease and yellow fever, characterized by internal bleeding or bleeding into the skin
  • haulage contractor — a person or firm that transports goods by lorry
  • have a screw loose — a metal fastener having a tapered shank with a helical thread, and topped with a slotted head, driven into wood or the like by rotating, especially by means of a screwdriver.
  • health care worker — A health care worker is someone who works in a hospital or health centre.
  • heimlich manoeuvre — a technique in first aid to dislodge a foreign body in a person's windpipe by applying sudden upward pressure on the upper abdomen
  • helicopter station — a place where helicopters are kept in readiness for use
  • heteroscedasticity — (statistics) The property of a series of random variables of 'not' every variable having the same finite variance.
  • heteroskedasticity — Alternative spelling of heteroscedasticity.
  • hexachlorobiphenyl — (organic compound) Either of forty-two isomers of the polychlorinated biphenyl containing six chlorine atoms.
  • higher-order macro — A means of expressing certain higher-order functions in a first order language. Proposed by Phil Wadler. Higher-order macros cannot be recursive at the top level but they may contain recursive definitions. E.g. See partial evaluation.
  • hippocratic facies — the sallow facial expression, with listless staring eyes, often regarded as denoting approaching death
  • histomorphological — histology.
  • historical fiction — the genre of literature, film, etc., comprising narratives that take place in the past and are characterized chiefly by an imaginative reconstruction of historical events and personages.
  • historical geology — the branch of geology dealing with the history of the earth.
  • historical present — the present tense used in narrating a past event as if happening at the time of narration.
  • honorary secretary — a unpaid person who is one of the managers of an organization
  • horseless carriage — an automobile: The horse and buggy were eventually replaced by the horseless carriage.
  • hot-water cylinder — a vertical cylindrical tank for storing hot water, esp an insulated one made of copper used in a domestic hot-water system
  • hydrocinnamic acid — a white crystalline compound, C 9 H 10 O 2 , with a floral odor, used in perfumes and flavoring.
  • hydrofluorocarbons — Plural form of hydrofluorocarbon.
  • hydroxyacetic acid — glycolic acid.
  • hyper-metaphorical — a figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in “A mighty fortress is our God.”. Compare mixed metaphor, simile (def 1).
  • hypercholesteremia — Alternative spelling of hypercholesteraemia.
  • hyperconcentration — the act of concentrating; the state of being concentrated.
  • hypernationalistic — a person devoted to nationalism.
  • hypochromic anemia — an anemia characterized by an abnormally low concentration of hemoglobin in the red blood cells, often due to iron deficiency.
  • hypogastric artery — iliac artery (def 3).
  • hyposulfurous acid — an acid, H 2 S 2 O 4 , next in a series below sulfurous acid, known only in solution or in the form of its salts.
  • hysterical reasons — (Or "hysterical raisins") A variant on the stock phrase "for historical reasons", indicating specifically that something must be done in some stupid way for backward compatibility, and moreover that the feature it must be compatible with was the result of a bad design in the first place. "All IBM PC video adaptors have to support MDA text mode for hysterical reasons." Compare bug-for-bug compatible.
  • immunopharmacology — the branch of pharmacology concerned with the immune system
  • in accordance with — conforming to
  • in comparison with — when compared to
  • indecent behaviour — the offence of committing indecent acts
  • ionization chamber — a device for detecting and measuring ionizing radiation, consisting of a tube containing a low pressure gas and two electrodes between which a high voltage is maintained. The current between the electrodes is a function of the intensity of the radiation
  • irreproachableness — The quality or state of being irreproachable; integrity; innocence.
  • isothermal process — a process that takes place without change in temperature.
  • japanese artichoke — Chinese artichoke.
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