18-letter words containing d, e, h, y
- acadian flycatcher — a small, greenish tyrant flycatcher (Empidonax virescens) found in deciduous forests of E North America
- according to hoyle — according to the rules and regulations; in the prescribed, fair, or correct way
- adenosylmethionine — (biochemistry) An adenosyl derivative of methionine that is a common co-substrate involved in transmethylation.
- aerothermodynamics — the study of the exchange of heat between solids and gases, esp of the heating effect on aircraft flying through the air at very high speeds
- ahead of your time — If someone is ahead of their time or before their time, they have new ideas a long time before other people start to think in the same way.
- alumina trihydrate — a crystalline, water-insoluble powder, Al(OH) 3 or Al 2 O 3 ⋅3H 2 O, obtained chiefly from bauxite: used in the manufacture of glass, ceramics, and printing inks, in dyeing, and in medicine as an antacid and in the treatment of ulcers.
- aluminum hydroxide — a white powder, Al(OH)3, obtained from bauxite and used to make glass, paper, etc. and in antacids
- ammonium hydroxide — a compound existing only in aqueous solution, formed when ammonia dissolves in water to form ammonium ions and hydroxide ions. Formula: NH4OH
- applied psychology — psychology that is put to practical use
- auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
- bach flower remedy — an alternative medicine consisting of a distillation from various flowers, designed to counteract negative states of mind and restore emotional balance
- beyond one's depth — in water deeper than one is tall
- bhumibol adulyadej — (Phumiphon Aduldet; Bhumibol Adulyadej) born 1927, king of Thailand since 1946.
- borax pentahydrate — a white, crystalline, water-soluble solid, Na 2 B 4 O 7 ⋅5H 2 O, used chiefly for killing weeds, as a water softener, and as a disinfectant and deodorizing agent.
- carbonic anhydrase — an enzyme in blood cells that catalyses the decomposition of carbonic acid into carbon dioxide and water, facilitating the transport of carbon dioxide from the tissues to the lungs
- carbonic-anhydride — carbon dioxide.
- chartered surveyor — (in Britain) a surveyor who is registered with the Royal Institution of Chartered Surveyors as having the qualifications, training, and experience to satisfy their professional requirements
- chlorohydroquinone — a white to light-tan, crystalline, water-soluble solid, C 6 H 3 Cl(OH) 2 , used chiefly in organic synthesis and as a developer in photography.
- chrétien de troyes — 12th century, French poet, who wrote the five Arthurian romances Erec; Cligès; Lancelot, le chevalier de la charette; Yvain, le chevalier au lion; and Perceval, le conte del Graal (?1155–?1190), the first courtly romances
- climbing hydrangea — a woody vine, Hydrangea anomala, of eastern Asia, having shiny, egg-shaped leaves and flat-topped white flower clusters, and climbing by aerial rootlets.
- commodity exchange — an exchange where commodities are traded
- cot death syndrome — the unexplained sudden death of an infant during sleep
- crested flycatcher — any of various tyrant flycatchers (esp. genus Myiarchus) with a prominent crest
- 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
- daisywheel printer — (printer) A kind of impact printer where the characters are arranged on the ends of the spokes of a wheel (resembling the petals on a daisy). The wheel (usually made of plastic) is rotated to select the character to print and then an electrically operated hammer mechanism bends the selected spoke forward slightly, sandwiching an ink ribbon between the character and the paper, as in a typewriter. One advantage of this arrangement over that of a typewriter is that different wheels may be inserted to produce different typefaces.
- death by chocolate — a very rich type of chocolate dessert or cake
- death-valley curve — a curve on a graph showing how the capital of a new company plotted against time declines sharply as the venture capital is used up before income reaches predicted levels
- decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
- 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 technology — the branch of scientific or engineering knowledge that deals with the creation and practical use of digital or computerized devices, methods, systems, etc.: advances in digital technology.
- dihydrotachysterol — a white, crystalline, water-insoluble sterol, C 28 H 46 O, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
- dimethyl sulfoxide — DMSO.
- dimethylsulphoxide — a colourless odourless liquid substance used as a solvent and in medicine as an agent to improve the penetration of drugs applied to the skin. Formula: (CH3)2SO
- dimethyltryptamine — a hallucinogenic drug, C 12 H 16 N 2 , with an action of short duration. Abbreviation: DMT.
- diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
- 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
- eighty-column mind — (abuse) The sort said to be possessed by persons for whom the transition from punched card to paper tape was traumatic (nobody has dared tell them about disks yet). It is said that these people, including (according to an old joke) the founder of IBM, will be buried "face down, 9-edge first" (the 9-edge being the bottom of the card). This directive is inscribed on IBM's 1402 and 1622 card readers and is referenced in a famous bit of doggerel called "The Last Bug", the climactic lines of which are as follows: He died at the console Of hunger and thirst. Next day he was buried, Face down, 9-edge first. The eighty-column mind is thought by most hackers to dominate IBM's customer base and its thinking. See fear and loathing, card walloper.
- epicycloidal wheel — one of the planetary gears of an epicyclic train
- every now and then — from time to time; occasionally
- 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.
- five hundred rummy — a variety of rummy in which the winner is the first player to score 500 points.
- fly off the handle — a part of a thing made specifically to be grasped or held by the hand.
- handyman's special — fixer-upper.
- hardy-weinberg law — a principle stating that in an infinitely large, randomly mating population in which selection, migration, and mutation do not occur, the frequencies of alleles and genotypes do not change from generation to generation.
- haud your wheesht! — be silent! hush!
- head disk assembly — (hardware, storage) (HDA) A sealed, high capacity mainframe hard disk with integral heads, as opposed to a removable disk.
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