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18-letter words containing h, e, d, r, o

  • comparative method — a body of procedures and criteria used by linguists to determine whether and how two or more languages are related and to reconstruct forms of their hypothetical parent language.
  • connected subgraph — (mathematics)   A connected graph consisting of a subset of the nodes and edges of some other graph.
  • considered harmful — (programming, humour)   A type of phrase based on the title of Edsger W. Dijkstra's famous note in the March 1968 Communications of the ACM, "Goto Statement Considered Harmful", which fired the first salvo in the structured programming wars. Amusingly, the ACM considered the resulting acrimony sufficiently harmful that it will (by policy) no longer print articles taking so assertive a position against a coding practice. In the ensuing decades, a large number of both serious papers and parodies bore titles of the form "X considered Y". The structured-programming wars eventually blew over with the realisation that both sides were wrong, but use of such titles has remained as a persistent minor in-joke.
  • cordless telephone — a portable battery-powered telephone with a short-range radio link to a fixed base unit
  • cot death syndrome — the unexplained sudden death of an infant during sleep
  • cushing's syndrome — a medical condition characterized by obesity, hypertension, excessive hair growth, etc., caused by an overactive adrenal gland or large doses of corticosteroids
  • deanthropomorphism — the ridding of philosophy or religion of anthropomorphic beliefs and doctrines.
  • dear john (letter) — a letter from one's fiancée or girlfriend breaking off an engagement or love affair, or from one's wife asking for a divorce
  • decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
  • dechristianization — The act of dechristianizing; the systematic removal of Christianity or Christian elements.
  • demorgan's theorem — (logic)   A logical theorem which states that the complement of a conjunction is the disjunction of the complements or vice versa. In symbols: not (x and y) = (not x) or (not y) not (x or y) = (not x) and (not y) E.g. if it is not the case that I am tall and thin then I am either short or fat (or both). The theorem can be extended to combinations of more than two terms in the obvious way. The same laws also apply to sets, replacing logical complement with set complement, conjunction ("and") with set intersection, and disjunction ("or") with set union. A (C) programmer might use this to re-write if (!foo && !bar) ... as if (!(foo || bar)) ... thus saving one operator application (though an optimising compiler should do the same, leaving the programmer free to use whichever form seemed clearest).
  • dendrochronologist — One who carries out dendrochronology.
  • dermot macmurrough — ?1110–71, king of Leinster, who, by enlisting the support of the English to win back his kingdom, was responsible for the English conquest of Ireland
  • determinate growth — growth of a plant stem that is terminated early by the formation of a bud
  • diatomaceous earth — an unconsolidated form of diatomite
  • dichloracetic acid — a highly corrosive acid. Formula: C2H2Cl2O2
  • diethylstilbestrol — a nonsteroidal synthetic estrogen, C 18 H 20 O 2 , used in medicine chiefly in the treatment of menopausal symptoms and in animal feeds for chemical caponization: formerly used during pregnancy for the prevention of miscarriage but discontinued owing to its association with an increased risk of vaginal and cervical cancers in women having had fetal exposure. Abbreviation: DES.
  • digital switchover — the process of changing the method of transmitting television from analogue to digital format
  • dihydrotachysterol — a white, crystalline, water-insoluble sterol, C 28 H 46 O, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
  • diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
  • dodecadodecahedral — Having the form of a dodecadodecahedron.
  • dodecadodecahedron — (geometry) A nonconvex polyhedron with twenty-four faces, thirty vertices, and sixty edges.
  • down to the ground — thoroughly; completely
  • drinking chocolate — sweetened cocoa powder
  • drop in the bucket — a deep, cylindrical vessel, usually of metal, plastic, or wood, with a flat bottom and a semicircular bail, for collecting, carrying, or holding water, sand, fruit, etc.; pail.
  • drug on the market — Pharmacology. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well-being.
  • dry-powder inhaler — A dry-powder inhaler is a device that delivers medication to the lungs in the form of a dry powder.
  • duchenne dystrophy — the most common form of muscular dystrophy, usually affecting only boys
  • duty-free shopping — the making of duty-free purchases
  • dysthymic disorder — a psychiatric disorder characterized by generalized depression that lasts for at least a year
  • each and every one — all
  • electrocardiograph — A machine used for electrocardiography.
  • 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).
  • every now and then — from time to time; occasionally
  • fall to the ground — (of a plan, theory, etc) to be rendered invalid, esp because of lack of necessary information
  • feast of orthodoxy — a solemn festival held on the first Sunday of Lent (Orthodoxy Sunday) commemorating the restoration of the use of icons in the church (a.d. 842) and the triumph over all heresies.
  • feldenkrais method — a system of gentle movements that promote flexibility, coordination, and self-awareness
  • fourth commandment — “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments.
  • from the ground up — the solid surface of the earth; firm or dry land: to fall to the ground.
  • get off the ground — project: start well
  • green-backed heron — a small, American heron, Butorides striatus, having glossy green wings.
  • harnessed antelope — any African antelope of the genus Tragelaphus, especially the bushbuck, having the body marked with white stripes and spots that resemble a harness, and, in the male, long, gently spiraling horns.
  • haud your wheesht! — be silent! hush!
  • have words with sb — If one person has words with another, or if two or more people have words, they have a serious discussion or argument, especially because one has complained about the other's behaviour.
  • head and shoulders — If you say that someone or something stands head and shoulders above other people or things, you mean that they are a lot better than them.
  • hearts and flowers — maudlin sentimentality: The play is a period piece, full of innocence abused and hearts and flowers.
  • hemorrhoidectomies — Plural form of hemorrhoidectomy.
  • hermaphrodite brig — a two-masted sailing vessel, square-rigged on the foremast and fore-and-aft-rigged on the mainmast.
  • heteroscedasticity — (statistics) The property of a series of random variables of 'not' every variable having the same finite variance.
  • heteroskedasticity — Alternative spelling of heteroscedasticity.
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