18-letter words containing a, c, d
- descriptive clause — a relative clause that describes or supplements but is not essential in establishing the identity of the antecedent and is usually set off by commas in English. In This year, which has been dry, is bad for crops the clause which has been dry is a nonrestrictive clause.
- destruct mechanism — a mechanism that causes the destruction of a rocket or missile when activated
- detective sergeant — a police officer who investigates crime and who ranks above a detective constable but below a detective inspector
- diagnostic testing — Diagnostic testing is the testing of a vehicle, or one of its systems or parts, in order to identify why it is not working properly.
- dialytic telescope — a type of achromatic telescope with a second correcting lens
- diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
- diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
- diatomaceous earth — an unconsolidated form of diatomite
- diazonium compound — any of a series of compounds that contain the group ArN 2 –, in which Ar represents an aryl group.
- dicalcium silicate — a component of cement, 2CaO⋅SiO 2 , also used to neutralize acid soils.
- dichloracetic acid — a highly corrosive acid. Formula: C2H2Cl2O2
- dictionary catalog — a library catalog having all its entries, including authors, titles, subjects, etc., in one general alphabetical sequence.
- dielectric heating — the heating of a nonconducting substance caused by dielectric loss when the material is placed in a variable electric field.
- 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.
- digital video disc — Digital Versatile Disc
- 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.
- diphtheria vaccine — a vaccine used to produce immunity against diphtheria
- diplomatic service — diplomatic corps
- diplomatic shuttle — a series of diplomatic visits to other states made by an official, such as an ambassador or envoy
- direct examination — the first interrogation of a witness by the side that has called that witness.
- directional signal — any of four signal lights on the front left, front right, rear left, and rear right of an automotive vehicle that, when actuated by the driver, flash in pairs on the side toward which a turn is to be made.
- 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.
- discourse analysis — the study of the rules or patterns characterizing units of connected speech or writing longer than a sentence.
- disenfranchisement — to disfranchise.
- disidentifications — Plural form of disidentification.
- dispatch documents — documents sent with a parcel, etc, detailing information such as contents, delivery address, etc
- display postscript — An extended form of PostScript permitting its interactive use with bitmap displays.
- distance education — education in which students receive instruction over the Internet, from a video, etc., instead of going to school.
- distracted driving — driving a vehicle while engaging in an activity that has the potential to distract the driver from the task of driving: Bans on cell phone use in cars will help to reduce the dangers of distracted driving.
- distribution class — form class
- doctype decoration — (humour) When a web author adds a doctype declaration but doesn't bother to write valid HTML.
- dodecadodecahedral — Having the form of a dodecadodecahedron.
- dodecadodecahedron — (geometry) A nonconvex polyhedron with twenty-four faces, thirty vertices, and sixty edges.
- domenico veneziano — died 1461, Italian painter, noted for the St Lucy Altarpiece
- domestic appliance — a machine used for household tasks, for example, a washing machine, refrigerator, etc.
- dominican republic — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- domremy-la-pucelle — a village in Lorraine, NE France, SW of Nancy: birthplace of Joan of Arc.
- 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.
- dragline excavator — a power shovel that operates by being dragged by cables at the end of an arm or jib: used for quarrying, opencast mining, etc
- dramatic monologue — a poetic form in which a single character, addressing a silent auditor at a critical moment, reveals himself or herself and the dramatic situation.
- drinking chocolate — sweetened cocoa powder
- driver's education — high-school driving classes
- ducking and diving — evasiveness
- due process of law — the administration of justice in accordance with established rules and principles
- dynamic psychology — any system of psychology that emphasizes the interaction between different motives, emotions, and drives
- dynamically scoped — dynamic scope
- dysfunctionalities — Plural form of dysfunctionality.