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20-letter words containing h, u

  • calcium hypochlorite — a white, crystalline compound, Ca(OCl) 2 , used as a disinfectant and bleaching agent.
  • 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.
  • carpathian mountains — a mountain system of central and E Europe, extending from Slovakia to central Romania: mainly forested, with rich iron ore resources. Highest peak: Gerlachovka, 2663 m (8788 ft)
  • casing head pressure — The casing head pressure is the pressure on the casing, which is measured at the wellhead.
  • catastrophic failure — Catastrophic failure is sudden and complete failure which cannot be put right.
  • centre three-quarter — either of two middle players on the three-quarter line
  • channel service unit — (communications)   (CSU) A type of interface used to connect a terminal or computer to a digital medium in the same way that a modem is used for connection to an analogue medium. A CSU is provided by the communication carrier to customers who wish to use their own equipment to retime and regenerate the incoming signals. The customer must supply all of the transmit logic, receive logic and timing recovery in order to use the CSU, whereas a digital service unit DSU performs these functions.
  • characteristic curve — a graph of the density of a particular photographic material plotted against the logarithm of the exposure producing this density
  • chartered accountant — (in Britain) an accountant who has passed the professional examinations of the Institute of Chartered Accountants in England and Wales, the Institute of Chartered Accountants of Scotland, or the Institute of Chartered Accountants in Ireland
  • chauffeur-driven car — a car driven by a chauffeur
  • checkbook journalism — the practice of paying for a news story or an interview, or for exclusive broadcasting or publishing rights.
  • chemolithoautotrophs — Plural form of chemolithoautotroph.
  • chemotherapeutically — By means of chemotherapy.
  • chief superintendent — an officer of senior rank in a British police force or other similarly organized force
  • chikamatsu monzaemon — (born Sugimori Nobumori) 1653-1724; Jpn. dramatist: called the Shakespeare of Japan
  • child support agency — the British government agency concerned with the welfare of children
  • child-abuse register — (in Britain) a list of children deemed to be at risk of abuse or injury from their parents or guardians, compiled and held by a local authority, area health authority, or NSPCC Special Unit
  • christopher columbus — Christopher (Sp. Cristóbal Colón; It. Cristoforo Colombo) 1446?–1506, Italian navigator in Spanish service: traditionally considered the discoverer of America 1492.
  • chuck it all (in/up) — If someone chucks it all, they stop doing their job, and usually move somewhere else. In British English you can also say that someone chucks it all up or chucks it all in.
  • church commissioners — a group of representatives of Church and State that administers the endowments and property of the Church of England
  • clothes manufacturer — a business concern that manufactures clothes
  • come out in the wash — If you say that something will come out in the wash, you mean that people will eventually find out the truth about it.
  • common lodging house — a cheap lodging house
  • commune with oneself — to think; ponder
  • communication theory — information theory.
  • computability theory — (mathematics)   The area of theoretical computer science concerning what problems can be solved by any computer. A function is computable if an algorithm can be implemented which will give the correct output for any valid input. Since computer programs are countable but real numbers are not, it follows that there must exist real numbers that cannot be calculated by any program. Unfortunately, by definition, there isn't an easy way of describing any of them! In fact, there are many tasks (not just calculating real numbers) that computers cannot perform. The most well-known is the halting problem, the busy beaver problem is less famous but just as fascinating.
  • consultant physician — a physician who has attained the rank of consultant in a particular speciality
  • continuum hypothesis — the assertion that there is no set whose cardinality is greater than that of the integers and smaller than that of the reals
  • contradistinguishing — Present participle of contradistinguish.
  • council of the reich — the Reichsrat.
  • council of the union — the legislature of the former Soviet Union and its successor states, consisting of an upper house (Soviet of the Union or Council of the Union) whose delegates are elected on the basis of population, and a lower house (Soviet of Nationalities or Council of Nationalities) whose delegates are elected to represent the various nationalities.
  • count one's chickens — If you say that someone is counting their chickens, you mean that they are assuming that they will be successful or get something, when this is not certain.
  • crime and punishment — a novel (1866) by Feodor Dostoevsky.
  • curry favour with sb — If one person tries to curry favour with another, they do things in order to try to gain their support or co-operation.
  • cut one's own throat — to be the means of one's own ruin
  • cut the gordian knot — to find a quick, bold solution for a perplexing problem
  • de la madrid hurtado — Miguel [mee-gel] /miˈgɛl/ (Show IPA), 1934–2012, Mexican political leader: president 1982–88.
  • deduct from the bill — If you deduct an item or expense from the bill at a restaurant or hotel, you take a charge out of a customer's bill.
  • diammonium phosphate — a white, crystalline, water-soluble compound, (NH 4) 2 HPO 4 , used as fertilizer, in fire extinguishers, etc.
  • diamond in the rough — a diamond in its natural state
  • dichotomous question — a question to which there can only be one of two answers, often "yes" or "no"
  • differential housing — the casing that houses the differential of a motor vehicle
  • diisobutyl phthalate — a clear, colorless liquid, C 14 H 26 O 4 , used chiefly as a plasticizer for nitrocellulose.
  • diophantine equation — an equation involving more than one variable in which the coefficients of the variables are integers and for which integral solutions are sought.
  • discounted cash flow — a technique for appraising an investment that takes into account the different values of future returns according to when they will be received
  • disruptive discharge — the sudden, large increase in current through an insulating medium resulting from complete failure of the medium under electrostatic stress.
  • distribution channel — trade: retailer
  • doctor of the church — a title conferred on an ecclesiastic for great learning and saintliness.
  • double-aspect theory — a monistic theory that holds that mind and body are not distinct substances but merely different aspects of a single substance
  • dry-bulb thermometer — a thermometer having a dry bulb: used in conjunction with a wet-bulb thermometer in a psychrometer.
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