18-letter words containing a, l, d, r
- credibility rating — a supposed measure of how far a person can be believed or trusted
- crested dog's-tail — a common wiry perennial grass, Cynosurus cristatus, of meadows and pasture
- crested flycatcher — any of various tyrant flycatchers (esp. genus Myiarchus) with a prominent crest
- cross-disciplinary — linking two or more fields of study
- crude oil desalter — A crude oil desalter is equipment which removes inorganic salts from crude oil, using chemical or electrostatic separation.
- crude oil fraction — A crude oil fraction is a component of crude oil, which has its own particular molecular composition, weight, and boiling point.
- cultural diffusion — act of diffusing; state of being diffused.
- cultural diversity — the cultural variety and cultural differences that exist in the world, a society, or an institution: Dying languages and urbanization are threats to cultural diversity.
- cumberland plateau — division of the W Appalachians, extending from S W.Va. to N Ala.
- curvature of field — a monochromatic aberration of a lens or other optical system in which the focal surface is curved, the refracted image of an object oriented perpendicular to the axis of the lens lying on a curved surface rather than in a plane perpendicular to the axis.
- 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.
- david lloyd george — David, 1st Earl of Dwyfor [doo-vawr] /ˈdu vɔr/ (Show IPA), 1863–1945, British statesman: prime minister 1916–22.
- dead as a doornail — completely dead
- dead-letter office — an office where undeliverable letters were taken for storage
- 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
- 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.
- declaration of war — a formal statement made by one country to another that a state of war now exists between them
- decompartmentalize — to remove excessive compartmentalization from (an organization)
- defense calculator — IBM 701
- deferred liability — income received in advance and carried forward as a liability until the associated goods, services, or benefits are delivered
- delaware water gap — a gorge on the boundary between E Pennsylvania and NW New Jersey.
- delmarva peninsula — a peninsula of the northeast US, between Chesapeake Bay and the Atlantic
- demilitarized zone — an area from which military presence or function has been removed
- departmental store — a department store.
- departure platform — a raised area at a railway station from which passengers can board trains prior to their departing
- dependent variable — a variable in a mathematical equation or statement whose value depends on that taken on by the independent variable
- depository library — a library designated by law to receive without charge all or a selection of the official publications of a government.
- 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.
- devil's paintbrush — a perennial European hawkweed (Hieracium aurantiacum) with leafless flower stalks bearing a cluster of orange-red heads: now a common weed in N U.S. and Canada
- dia de los muertos — Day of the Dead.
- 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
- 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.
- dietary supplement — a substance taken in addition to what you eat in order to promote health
- digital multimeter — (electronics) (DMM) A peice of test equipment used for measuring voltage, current, resistance, and possibly other electircal quantities and displaying the value in number form.
- digital signatures — digital signature
- 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.
- 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.
- diplomatic service — diplomatic corps
- 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.
- discourse analysis — the study of the rules or patterns characterizing units of connected speech or writing longer than a sentence.
- dispersible tablet — A dispersible tablet is a tablet that disintegrates in water or other liquid.
- display postscript — An extended form of PostScript permitting its interactive use with bitmap displays.
- disproportionality — not in proportion; disproportionate.
- disproportionately — not proportionate; out of proportion, as in size or number.