18-letter words containing h, e, a, d
- diatomaceous earth — an unconsolidated form of diatomite
- dichloracetic acid — a highly corrosive acid. Formula: C2H2Cl2O2
- didaskaleinophobia — The fear of going to school.
- dielectric heating — the heating of a nonconducting substance caused by dielectric loss when the material is placed in a variable electric field.
- digital humanities — (used with a singular verb) the study of literature, philosophy, etc., as facilitated by computer technology or digital media: Digital humanities uses data analysis to find patterns in large bodies of text. the set of methodologies used in such scholarship.
- digital switchover — the process of changing the method of transmitting television from analogue to digital format
- 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.
- 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.
- diphtheria vaccine — a vaccine used to produce immunity against diphtheria
- diplomatic shuttle — a series of diplomatic visits to other states made by an official, such as an ambassador or envoy
- discharge printing — a fabric-printing method in which the material is dyed and then certain areas are discharged so as to permit the original hue or its color replacement to act as a pattern against the colored ground.
- disenfranchisement — to disfranchise.
- disodium phosphate — sodium phosphate (def 2).
- dispatch documents — documents sent with a parcel, etc, detailing information such as contents, delivery address, etc
- do not give a hoot — If you say that you don't give a hoot or don't care two hoots about something, you are emphasizing that you do not care at all about it.
- dodecadodecahedral — Having the form of a dodecadodecahedron.
- dodecadodecahedron — (geometry) A nonconvex polyhedron with twenty-four faces, thirty vertices, and sixty edges.
- double achievement — a representation of the arms of a husband beside those of his wife such that a difference of rank between them is shown.
- dr. james h. clark — (person) The founder of Silicon Graphics, Inc. and co-founder of Netscape Communications Corporation.
- drinking chocolate — sweetened cocoa powder
- 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.
- each and every one — all
- electric discharge — electricity emitted
- electrocardiograph — A machine used for electrocardiography.
- epicycloidal wheel — one of the planetary gears of an epicyclic train
- established church — a Church that is officially recognized as a national institution, esp the Church of England
- 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
- farmer in the dell — a game, accompanied by a song with several verses, in which one person, designated as the farmer, occupies the center of a circle of persons and is joined in the circle by other players designated as wife, child, nurse, cat, rat, and cheese, these then leaving the circle in order except for the one designated as cheese, who is left standing alone in the circle at the end.
- 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
- ferdinand schiller — Ferdinand Canning Scott [kan-ing] /ˈkæn ɪŋ/ (Show IPA), 1864–1937, English philosopher in the U.S.
- fight to the death — If you say that you will fight to the death for something, you are emphasizing that you will do anything to achieve or protect it, even if you suffer as a consequence.
- flame-of-the-woods — an Indian evergreen shrub, Ixora coccinea, of the madder family, having red, tubular flowers in dense clusters.
- flash butt welding — a method of welding metal edge-to-edge with a powerful electric flash followed by the application of pressure.
- fly off the handle — a part of a thing made specifically to be grasped or held by the hand.
- fourth commandment — “Remember the sabbath day, to keep it holy”: fourth of the Ten Commandments.
- gas-discharge tube — any tube in which an electric discharge takes place through a gas
- get the upper hand — gain advantage
- give one's hand on — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- give sb their head — If you give someone their head, you allow them to do what they want to do, without trying to advise or stop them.
- gladden sb's heart — If you say that something gladdens someone's heart, you mean that it makes them feel pleased and hopeful.
- go off half-cocked — (of a firearm) at the position of half cock.
- goods and chattels — personal property
- grandfather clause — U.S. History. a clause in the constitutions of some Southern states after 1890 intended to permit whites to vote while disfranchising blacks: it exempted from new literacy and property qualifications for voting those men entitled to vote before 1867 and their lineal descendants.
- green-backed heron — a small, American heron, Butorides striatus, having glossy green wings.