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20-letter words containing h, a, i, d

  • heat of condensation — the heat liberated by a unit mass of gas at its boiling point as it condenses to a liquid: equal to the heat of vaporization.
  • helmeted guinea fowl — the common guinea fowl in its wild state.
  • heston and isleworth — a former borough, now part of Hounslow, in SE England, near London.
  • heteropolysaccharide — (carbohydrate) any polysaccharide formed from two or more different kinds of monosaccharide.
  • hexadecimal notation — a number system having a base 16; the symbols for the numbers 0–9 are the same as those used in the decimal system, and the numbers 10–15 are usually represented by the letters A–F. The system is used as a convenient way of representing the internal binary code of a computer
  • hildegard von bingen — Hildegard von (Hildegard of Bingen"Sibyl of the Rhine") 1098–1178, German nun, healer, writer, and composer.
  • hindu-arabic numeral — Arabic numeral.
  • hit-and-run accident — a motor-vehicle accident in which the driver leaves the scene without stopping to give assistance, inform the police, etc
  • hold one's head high — to conduct oneself in a proud and confident manner
  • horizontal microcode — (processor)   Microcode using horizontal encoding.
  • horizontally opposed — A horizontally opposed engine has the cylinders set horizontally at either side of the crankshaft.
  • hospitality industry — the hotel and accommodation industry
  • household appliances — devices or machines, usually electrical, that are in your home and which you use to do jobs such as cleaning or cooking
  • huntington's disease — a hereditary disease of the central nervous system characterized by brain deterioration and loss of control over voluntary movements, the symptoms usually appearing in the fourth decade of life.
  • hurricane-force wind — a wind, not necessarily a hurricane, having a speed of more than 72 miles per hour (32 m/sec): the strongest of the winds.
  • hydraulic fracturing — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
  • hydraulic suspension — a system of motor-vehicle suspension using hydraulic members, often with hydraulic compensation between front and rear systems (hydroelastic suspension)
  • hydrodesulfurization — desulfurization by catalytic agents of the sulfur-rich hydrocarbons obtained from petroleum or the like during cracking or hydrocracking.
  • hydrostatic pressure — Hydrostatic pressure is the pressure exerted by a liquid that depends on how deep it is.
  • hyperadrenocorticism — Cushing's syndrome.
  • hypophosphorous acid — a colorless or yellowish, water-soluble, liquid, monobasic acid, H 3 PO 2 , having a sour odor, and used as a reducing agent.
  • in the driver's seat — If you say that someone is in the driver's seat, you mean that they are in control in a situation.
  • in the public domain — able to be discussed and examined freely by the general public
  • independence of path — the property of a function for which the line integral has the same value along all curves between two specified points.
  • indicated horsepower — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
  • indistinguishability — The state of being indistinguishable.
  • infrared photography — photography using film with an emulsion that is sensitive to infrared light, enabling it to be used in misty weather, in darkened interiors, or at night. It has applications in aerial surveys, the detection of forgeries, etc
  • internal hemorrhoids — Usually, hemorrhoids. Pathology. an abnormally enlarged vein mainly due to a persistent increase in venous pressure, occurring inside the anal sphincter of the rectum and beneath the mucous membrane (internal hemorrhoid) or outside the anal sphincter and beneath the surface of the anal skin (external hemorrhoid)
  • justifiable homicide — murder committed under extenuating circumstances
  • kill the fatted calf — the young of the domestic cow or other bovine animal.
  • lead with one's chin — to act so imprudently as to invite disaster
  • like death warmed up — very ill
  • live and breathe sth — be passionately interested in sth
  • lord high chancellor — the highest judicial officer of the British crown: law adviser of the ministry, keeper of the great seal, presiding officer in the House of Lords, etc.
  • lou gehrig's disease — amyotrophic lateral sclerosis.
  • madwoman of chaillot — a satirical comedy (1945) by Jean Giraudoux.
  • magdeburg hemisphere — one of a pair of hemispherical cups from which air can be evacuated when they are placed together: used to demonstrate the force of air pressure.
  • magnetohydrodynamics — the branch of physics that deals with the motion of electrically conductive fluids, especially plasmas, in magnetic fields. Abbreviation: MHD.
  • mail exchange record — (messaging)   (MX Record) A DNS resource record type that says which SMTP server handles electronic mail for a particular domain. E.g. the MX record foo.co.uk. 1054 IN MX 10 mail.foo.co.uk. means that mail for an address like "[email protected]" should be sent to "mail.foo.co.uk". There can be several servers for a domain. The "10" is a priority - the server with the lowest number will be tried first.
  • make head (n)or tail — If you say that you cannot make head nor tail of something or you cannot make head or tail of it, you are emphasizing that you cannot understand it at all.
  • make head or tail of — to attempt to understand (a problem, etc)
  • matched-pairs design — (of an experiment) concerned with measuring the values of the dependent variables for pairs of subjects that have been matched to eliminate individual differences and that are respectively subjected to the control and the experimental condition
  • mechanical advantage — the ratio of output force to the input force applied to a mechanism.
  • mechanical impedance — impedance (def 2).
  • mechanical-impedance — Electricity. the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z.
  • meta-dichlorobenzene — a colorless liquid, C 6 H 4 Cl 2 , soluble in alcohol and ether: used as a fumigant and insecticide.
  • multistep hydroplane — a motorship having a flat bottom built as a series of planes inclined forward, the ship planing on each from stem to stern as its speed increases.
  • neighbourhood warden — a person employed by a local authority to patrol residential areas and deal with antisocial behaviour
  • netherlands antilles — a Netherlands overseas territory in the Caribbean Sea, N and NE of Venezuela; includes the islands of Aruba, Bonaire, Curaçao, Saba, and St. Eustatius, and the S part of St. Martin: considered an integral part of the Dutch realm. 366 sq. mi. (948 sq. km). Capital: Willemstad.
  • nineteenth amendment — an amendment to the U.S. Constitution, ratified in 1920, guaranteeing women the right to vote.
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