| deflagrate | (verb) burn with great heat and intense light | - |
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| (verb) cause to burn rapidly and with great intensity | - |
| deflagration | (noun) combustion that propagates through a gas or along the surface of an explosive at a rapid rate driven by the transfer of heat | - |
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| degage | (adjective) free and relaxed in manner | - |
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| (adjective) showing lack of emotional involvement | Synonyms: detached, uninvolved |
| dekagram | (noun) 10 grams | Synonyms: dag, decagram, dkg |
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| demagnetisation | (noun) the process of removing magnetization | Synonyms: demagnetization |
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| demagnetise | (verb) make nonmagnetic; take away the magnetic properties (of) | Synonyms: degauss, demagnetize |
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| (verb) erase (a magnetic storage device) | Synonyms: demagnetize |
| demagnetization | (noun) the process of removing magnetization | Synonyms: demagnetisation |
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| demagnetize | (verb) make nonmagnetic; take away the magnetic properties (of) | Synonyms: degauss, demagnetise |
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| (verb) erase (a magnetic storage device) | Synonyms: demagnetise |
| demagog | (noun) a political leader who seeks support by appealing to popular passions and prejudices | Synonyms: demagogue, rabble-rouser |
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| demagogic | (adjective) characteristic of or resembling a demagogue | Synonyms: demagogical |
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| demagogical | (adjective) characteristic of or resembling a demagogue | Synonyms: demagogic |
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| demagogue | (noun) a political leader who seeks support by appealing to popular passions and prejudices | Synonyms: demagog, rabble-rouser |
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| demagoguery | (noun) impassioned appeals to the prejudices and emotions of the populace | Synonyms: demagogy |
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| demagogy | (noun) impassioned appeals to the prejudices and emotions of the populace | Synonyms: demagoguery |
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| demurrage | (noun) detention of a ship or freight car or other cargo beyond its scheduled time of departure | - |
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| (noun) a charge required as compensation for the delay of a ship or freight car or other cargo beyond its scheduled time of departure | - |
| diaglyph | (noun) glyptic art consisting of a sunken or depressed engraving or carving on a stone or gem (as opposed to cameo) | Synonyms: intaglio |
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| diagnosable | (adjective) capable of being diagnosed | - |
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| diagnose | (verb) determine or distinguish the nature of a problem or an illness through a diagnostic analysis | Synonyms: name |
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| (verb) subject to a medical analysis | - |
| diagnosing | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosis |
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| diagnosis | (noun) identifying the nature or cause of some phenomenon | Synonyms: diagnosing |
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| diagnostic | (adjective) concerned with diagnosis; used for furthering diagnosis | - |
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| (adjective) characteristic or indicative of a disease | Synonyms: symptomatic |
| diagnostician | (noun) a doctor who specializes in medical diagnosis | Synonyms: pathologist |
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| diagnostics | (noun) the branch of medical science dealing with the classification of disease | Synonyms: nosology |
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| diagonal | (adjective) having an oblique or slanted direction | Synonyms: aslant, aslope, slanted, slanting, sloped, sloping |
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| (adjective) connecting two nonadjacent corners of a plane figure or any two corners of a solid that are not in the same face | - |
| (noun) a punctuation mark (/) used to separate related items of information | Synonyms: separatrix, slash, solidus, stroke, virgule |
| (noun) an oblique line of squares of the same color on a checkerboard | - |
| (noun) (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry | - |
| (noun) a line or cut across a fabric that is not at right angles to a side of the fabric | Synonyms: bias |
| (noun) (geometry) a straight line connecting any two vertices of a polygon that are not adjacent | - |
| diagonalisation | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalization |
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| diagonalise | (verb) transform a matrix to a diagonal matrix | Synonyms: diagonalize |
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| diagonalizable | (adjective) capable of being transformed into a diagonal matrix | - |
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| diagonalization | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalisation |
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| diagonalize | (verb) transform a matrix to a diagonal matrix | Synonyms: diagonalise |
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| diagonally | (adverb) in a diagonal manner | - |
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| diagram | (noun) a drawing intended to explain how something works; a drawing showing the relation between the parts | - |
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| (verb) make a schematic or technical drawing that shows interactions among variables or how something is constructed | Synonyms: plot |
| diagrammatic | (adjective) shown or represented by diagrams | Synonyms: diagrammatical |
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| diagrammatical | (adjective) shown or represented by diagrams | Synonyms: diagrammatic |
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| diagrammatically | (adverb) in a diagrammatic manner | Synonyms: graphically |
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| diagramming | (noun) providing a chart or outline of a system | Synonyms: schematisation, schematization |
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| diamagnet | (noun) a substance that exhibits diamagnetism | - |
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| diamagnetic | (adjective) relating to or exhibiting diamagnetism; slightly repelled by a magnet | - |
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| diamagnetism | (noun) phenomenon exhibited by materials like copper or bismuth that become magnetized in a magnetic field with a polarity opposite to the magnetic force; unlike iron they are slightly repelled by a magnet | - |
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| diaphragm | (noun) a mechanical device in a camera that controls size of aperture of the lens | Synonyms: stop |
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| (noun) electro-acoustic transducer that vibrates to receive or produce sound waves | - |
| (noun) a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix | Synonyms: contraceptive diaphragm, pessary |
| (noun) (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration | Synonyms: midriff |
| dinoflagellate | (noun) chiefly marine protozoa having two flagella; a chief constituent of plankton | - |
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| disadvantage | (noun) the quality of having an inferior or less favorable position | - |
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| (verb) put at a disadvantage; hinder, harm | Synonyms: disfavor, disfavour |
| disadvantaged | (adjective) marked by deprivation especially of the necessities of life or healthful environmental influences | Synonyms: deprived |
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| disadvantageous | (adjective) involving or creating circumstances detrimental to success or effectiveness | Synonyms: unfavorable, unfavourable |
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| disadvantageously | (adverb) in a disadvantageous way; to someone's disadvantage | Synonyms: badly |
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| disagree | (verb) be of different opinions | Synonyms: differ, dissent, take issue |
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| (verb) be different from one another | Synonyms: disaccord, discord |
| disagreeable | (adjective) not to your liking | - |
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| (adjective) unpleasant to interact with | - |
| (adjective) not agreeing with your tastes or expectations | Synonyms: unsympathetic |
| disagreeableness | (noun) an ill-tempered and offensive disposition | - |
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| (noun) the quality of being disagreeable and unpleasant | - |
| disagreeably | (adverb) in a disagreeable manner | - |
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| disagreement | (noun) a difference between conflicting facts or claims or opinions | Synonyms: discrepancy, divergence, variance |
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| (noun) the speech act of disagreeing or arguing or disputing | - |
| (noun) a conflict of people's opinions or actions or characters | Synonyms: dissension, dissonance |
| discourage | (verb) try to prevent; show opposition to | Synonyms: deter |
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| (verb) advise or counsel in terms of someone's behavior | Synonyms: admonish, monish, warn |
| (verb) deprive of courage or hope; take away hope from; cause to feel discouraged | - |
| discouraged | (adjective) lacking in resolution | - |
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| (adjective) made less hopeful or enthusiastic | Synonyms: demoralised, demoralized, disheartened |
| discouragement | (noun) the act of discouraging | - |
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| (noun) the expression of opposition and disapproval | - |
| (noun) the feeling of despair in the face of obstacles | Synonyms: disheartenment, dismay |
| discouraging | (adjective) depriving of confidence or hope or enthusiasm and hence often deterring action | - |
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| (adjective) expressing disapproval in order to dissuade | - |
| discouragingly | (adverb) in a discouraging manner | - |
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| disengage | (verb) become free | - |
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| (verb) release from something that holds fast, connects, or entangles | Synonyms: withdraw |
| (verb) free or remove obstruction from | Synonyms: free |
| disengagement | (noun) to break off a military action with an enemy | Synonyms: fallback, pullout |
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| (noun) the act of releasing from an attachment or connection | Synonyms: detachment |
| dishrag | (noun) a cloth for washing dishes | Synonyms: dishcloth |
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| disparage | (verb) express a negative opinion of | Synonyms: belittle, pick at |
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| disparagement | (noun) the act of speaking contemptuously of | Synonyms: dispraise |
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| (noun) a communication that belittles somebody or something | Synonyms: depreciation, derogation |
| disparager | (noun) one who disparages or belittles the worth of something | Synonyms: depreciator, detractor, knocker |
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| disparaging | (adjective) expressive of low opinion | Synonyms: derogative, derogatory |
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| disparagingly | (adverb) in a disparaging manner | Synonyms: slightingly |
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| divagate | (verb) lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking | Synonyms: digress, stray, wander |
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| divagation | (noun) a turning aside (of your course or attention or concern) | Synonyms: deflection, deflexion, deviation, digression, diversion |
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| (noun) a message that departs from the main subject | Synonyms: aside, digression, excursus, parenthesis |
| dockage | (noun) the act of securing an arriving vessel with ropes | Synonyms: docking, moorage, tying up |
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| (noun) landing in a harbor next to a pier where ships are loaded and unloaded or repaired; may have gates to let water in or out | Synonyms: dock, docking facility |
| (noun) a fee charged for a vessel to use a dock | Synonyms: docking fee |
| dodecagon | (noun) a twelve-sided polygon | - |
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| dosage | (noun) a measured portion of medicine taken at any one time | Synonyms: dose |
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| (noun) the quantity of an active agent (substance or radiation) taken in or absorbed at any one time | Synonyms: dose |
| dotage | (noun) mental infirmity as a consequence of old age; sometimes shown by foolish infatuations | Synonyms: second childhood, senility |
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| dowager | (noun) a widow holding property received from her deceased husband | - |
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| downstage | (adjective) of the front half of a stage | - |
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| (noun) the front half of the stage (as seen from the audience) | - |
| (adverb) at or toward the front of the stage | - |
| drag | (noun) the act of dragging (pulling with force) | - |
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| (noun) a slow inhalation (as of tobacco smoke) | Synonyms: puff, pull |
| (noun) clothing that is conventionally worn by the opposite sex (especially women's clothing when worn by a man) | - |
| (noun) something tedious and boring | - |
| (noun) something that slows or delays progress | - |
| (noun) the phenomenon of resistance to motion through a fluid | Synonyms: retarding force |
| (verb) proceed for an extended period of time | Synonyms: drag on, drag out |
| (verb) persuade to come away from something attractive or interesting | - |
| (verb) suck in or take (air) | Synonyms: draw, puff |
| (verb) pull, as against a resistance | - |
| (verb) draw slowly or heavily | Synonyms: cart, hale, haul |
| (verb) search (as the bottom of a body of water) for something valuable or lost | Synonyms: dredge |
| (verb) to lag or linger behind | Synonyms: drop back, drop behind, get behind, hang back, trail |
| (verb) walk without lifting the feet | Synonyms: scuff |
| (verb) move slowly and as if with great effort | - |
| (verb) use an input device to move objects on the screen, or to select items (such as commands from a menu); drag the slider to increase or decrease rate; drag the handles on the image to resize it | - |
| (verb) force into some kind of situation, condition, or course of action | Synonyms: drag in, embroil, sweep, sweep up, tangle |
| dragee | (noun) pill that is a sugar-coated medicated candy | - |
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| (noun) sugar-coated nut or fruit piece | - |
| (noun) silvery candy beads used for decorating cakes | - |
| dragger | (noun) a fishing boat that uses a trawl net or dragnet to catch fish | Synonyms: trawler |
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| (noun) someone who pulls or tugs or drags in an effort to move something | Synonyms: puller, tugger |
| dragging | (adjective) marked by a painfully slow and effortful manner | - |
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| draggingly | (adverb) in a dragging manner | - |
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| draggle | (verb) make wet and dirty, as from rain | Synonyms: bedraggle |
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| draggled | (adjective) limp and soiled as if dragged in the mud | Synonyms: bedraggled |
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| dragnet | (noun) a conical fishnet dragged through the water at great depths | Synonyms: trawl, trawl net |
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| (noun) a system of coordinated measures for apprehending (criminals or other individuals) | - |
| dragoman | (noun) an interpreter and guide in the Near East; in the Ottoman Empire in the 18th and 19th centuries a translator of European languages for the Turkish and Arab authorities and most dragomans were Greek (many reached high positions in the government) | - |
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| dragon | (noun) any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body | Synonyms: flying dragon, flying lizard |
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| (noun) a fiercely vigilant and unpleasant woman | Synonyms: tartar |
| (noun) a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings | Synonyms: European dragon, firedrake |
| dragonet | (noun) small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America | - |
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| dragonfly | (noun) slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc. | Synonyms: darning needle, devil's darning needle, mosquito hawk, sewing needle, skeeter hawk, snake doctor, snake feeder |
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| dragonhead | (noun) American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers | Synonyms: Dracocephalum parviflorum, dragon's head |
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| dragoon | (noun) a member of a European military unit formerly composed of heavily armed cavalrymen | - |
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| (verb) compel by coercion, threats, or crude means | Synonyms: railroad, sandbag |
| (verb) subjugate by imposing troops | - |
| drainage | (noun) emptying something accomplished by allowing liquid to run out of it | Synonyms: drain |
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| dressage | (noun) maneuvers of a horse in response to body signals by the rider | - |
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| driftage | (noun) the deviation (by a vessel or aircraft) from its intended course due to drifting | - |
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| drippage | (noun) a liquid (as water) that flows in drops (as from the eaves of house) | Synonyms: dripping |
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| dustrag | (noun) a piece of cloth used for dusting | Synonyms: dustcloth, duster |
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| dysphagia | (noun) condition in which swallowing is difficult or painful | - |
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| eager | (adjective) having or showing keen interest or intense desire or impatient expectancy | - |
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| (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: aegir, bore, eagre, tidal bore |
| eagerly | (adverb) with eagerness; in an eager manner | Synonyms: thirstily |
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| eagerness | (noun) prompt willingness | Synonyms: forwardness, readiness, zeal |
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| (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidity, avidness, keenness |
| eagle | (noun) any of various large keen-sighted diurnal birds of prey noted for their broad wings and strong soaring flight | Synonyms: bird of Jove |
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| (noun) an emblem representing power | - |
| (noun) a former gold coin in the United States worth 10 dollars | - |
| (noun) (golf) a score of two strokes under par on a hole | - |
| (verb) shoot in two strokes under par | - |
| (verb) shoot two strokes under par | Synonyms: double birdie |
| eaglet | (noun) a young eagle | - |
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| eagre | (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: aegir, bore, eager, tidal bore |
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| eatage | (noun) bulky food like grass or hay for browsing or grazing horses or cattle | Synonyms: forage, grass, pasturage, pasture |
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| effleurage | (noun) a rhythmic stroking | - |
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| electromagnet | (noun) a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet | - |
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| electromagnetic | (adjective) pertaining to or exhibiting magnetism produced by electric charge in motion | - |
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