| digressiveness | (noun) The characteristic quality of poetry that is marked by departure from the subject, course, or idea at hand; or by an exploration of a different or unrelated concern. | - |
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| digs | (noun) temporary living quarters | Synonyms: diggings, domiciliation, lodgings, pad |
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| (noun) an excavation for ore or precious stones or for archaeology | Synonyms: diggings |
| dihybrid | (noun) a hybrid produced by parents that differ only at two gene loci that have two alleles each | - |
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| dihydrostreptomycin | (noun) antibiotic consisting of a hydrogenated form of streptomycin; used against tuberculosis and tularemia and Gram-negative organisms | - |
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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| dika | (noun) African tree with edible yellow fruit resembling mangos; valued for its oil-rich seed and hardy green wood that resists termites | Synonyms: Irvingia gabonensis, wild mango, wild mango tree |
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| dike | (noun) a barrier constructed to contain the flow of water or to keep out the sea | Synonyms: dam, dyke |
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| (noun) (slang) offensive term for a lesbian who is noticeably masculine | Synonyms: butch, dyke |
| dilapidation | (noun) the process of becoming dilapidated | Synonyms: ruin |
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| (noun) a state of deterioration due to old age or long use | Synonyms: decrepitude |
| dilatation | (noun) the act of expanding an aperture | Synonyms: dilation |
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| (noun) the state of being stretched beyond normal dimensions | Synonyms: distension, distention |
| dilater | (noun) a surgical instrument that is used to dilate or distend an opening or an organ | Synonyms: dilator |
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| dilation | (noun) the act of expanding an aperture | Synonyms: dilatation |
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| (noun) a lengthy discussion (spoken or written) on a particular topic | - |
| dilator | (noun) a surgical instrument that is used to dilate or distend an opening or an organ | Synonyms: dilater |
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| (noun) a drug that causes dilation | - |
| (noun) a muscle or nerve that dilates or widens a body part | - |
| dilatoriness | (noun) slowness as a consequence of not getting around to it | Synonyms: procrastination |
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| dildo | (noun) a vibrating device that substitutes for an erect penis to provide vaginal stimulation | - |
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| dilemma | (noun) state of uncertainty or perplexity especially as requiring a choice between equally unfavorable options | Synonyms: quandary |
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| dilettante | (noun) an amateur who engages in an activity without serious intentions and who pretends to have knowledge | Synonyms: dabbler, sciolist |
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| diligence | (noun) a diligent effort | Synonyms: application |
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| (noun) persevering determination to perform a task | Synonyms: industriousness, industry |
| (noun) conscientiousness in paying proper attention to a task; giving the degree of care required in a given situation | - |
| dill | (noun) aromatic threadlike foliage of the dill plant used as seasoning | Synonyms: dill weed |
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| (noun) aromatic Old World herb having aromatic threadlike foliage and seeds used as seasoning | Synonyms: Anethum graveolens |
| dillenia | (noun) any of several evergreen trees or shrubs of the genus Dillenia grown for their foliage and nodding flowers resembling magnolias which are followed by fruit that is used in curries and jellies and preserves | - |
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| dillydallier | (noun) someone who wastes time | Synonyms: dallier, dilly-dallier, lounger, mope |
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| diltiazem | (noun) a calcium blocker (trade name Cardizem) used in treating hypertension or angina or heart failure | Synonyms: Cardizem |
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| diluent | (noun) a diluting agent | Synonyms: dilutant, thinner |
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| dilutant | (noun) a diluting agent | Synonyms: diluent, thinner |
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| dilution | (noun) weakening (reducing the concentration) by the addition of water or a thinner | - |
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| (noun) a diluted solution | - |
| dime | (noun) street name for a packet of illegal drugs that is sold for ten dollars | Synonyms: dime bag |
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| (noun) a United States coin worth one tenth of a dollar | - |
| dimenhydrinate | (noun) antihistamine and antiemetic (trade name Dramamine) used to treat motion sickness | Synonyms: Dramamine |
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| dimension | (noun) the magnitude of something in a particular direction (especially length or width or height) | - |
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| (noun) magnitude or extent | Synonyms: proportion |
| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: attribute, property |
| (noun) one of three Cartesian coordinates that determine a position in space | - |
| dimensionality | (noun) the spatial property of having dimensions | - |
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| dimer | (noun) a compound whose molecules are composed of two identical monomers | - |
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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| dimetrodon | (noun) carnivorous dinosaur of the Permian in North America having a crest or dorsal sail | - |
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| diminuendo | (noun) (music) a gradual decrease in loudness | Synonyms: decrescendo |
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| diminution | (noun) the act of decreasing or reducing something | Synonyms: decrease, reduction, step-down |
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| (noun) the statement of a theme in notes of lesser duration (usually half the length of the original) | - |
| (noun) change toward something smaller or lower | Synonyms: decline |
| diminutive | (noun) a word that is formed with a suffix (such as -let or -kin) to indicate smallness | - |
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| diminutiveness | (noun) the property of being very small in size | Synonyms: minuteness, petiteness, tininess, weeness |
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| dimity | (noun) a strong cotton fabric with a raised pattern; used for bedcovers and curtains | - |
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| dimmer | (noun) a rheostat that varies the current through an electric light in order to control the level of illumination | - |
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| dimness | (noun) the property of lights or sounds that lack brilliance or are reduced in intensity | Synonyms: subduedness |
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| (noun) the quality of being dim or lacking contrast | Synonyms: faintness |
| (noun) the state of being poorly illuminated | Synonyms: duskiness |
| dimorphism | (noun) (biology) the existence of two forms of individual within the same animal species (independent of sex differences) | - |
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| (noun) (chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms | - |
| dimout | (noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft) | Synonyms: blackout, brownout |
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| dimple | (noun) a small natural hollow in the cheek or chin | - |
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| (noun) any slight depression in a surface | - |
| (noun) a chad that has been punched or dimpled but all four corners are still attached | Synonyms: dimpled chad, pregnant chad |
| dimwit | (noun) a stupid incompetent person | Synonyms: doofus, half-wit, nitwit |
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| din | (noun) the act of making a noisy disturbance | Synonyms: commotion, ruckus, ruction, rumpus, tumult |
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| (noun) a loud harsh or strident noise | Synonyms: blare, blaring, cacophony, clamor |
| dinar | (noun) the basic unit of money in Algeria | Synonyms: Algerian dinar |
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| (noun) the basic unit of money in Bahrain; equal to 1,000 fils | Synonyms: Bahrain dinar |
| (noun) the basic unit of money in Iraq; equal to 1,000 fils | Synonyms: Iraqi dinar |
| (noun) the basic unit of money in Jordan; equal to 1,000 fils | Synonyms: Jordanian dinar |
| (noun) the basic unit of money in Kuwait; equal 1,000 fils | Synonyms: Kuwaiti dinar |
| (noun) the basic unit of money in Libya | Synonyms: Libyan dinar |
| (noun) the basic unit of money in Tunisia | Synonyms: Tunisian dinar |
| (noun) the basic unit of money in Yugoslavia | Synonyms: Yugoslavian dinar |
| (noun) 100 dinars equal 1 rial in Iran | Synonyms: Iranian dinar |
| diner | (noun) a passenger car where food is served in transit | Synonyms: buffet car, dining car, dining compartment |
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| (noun) a restaurant that resembles a dining car | - |
| (noun) a person eating a meal (especially in a restaurant) | - |
| dinero | (noun) informal terms for money | Synonyms: boodle, bread, cabbage, clams, dough, gelt, kale, lettuce, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum |
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| dinette | (noun) a small area off of a kitchen that is used for dining | - |
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| ding | (noun) an impression in a surface (as made by a blow) | Synonyms: dent, gouge, nick |
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| (noun) a ringing sound | - |
| dingbat | (noun) a silly empty-headed person | - |
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| dinge | (noun) discoloration due to dirtiness | Synonyms: dinginess |
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| dinghy | (noun) a small boat of shallow draft with cross thwarts for seats and rowlocks for oars with which it is propelled | Synonyms: dory, rowboat |
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| dinginess | (noun) discoloration due to dirtiness | Synonyms: dinge |
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| dingle | (noun) a small wooded hollow | Synonyms: dell |
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| dingo | (noun) wolflike yellowish-brown wild dog of Australia | Synonyms: Canis dingo, warragal, warrigal |
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| dining | (noun) the act of eating dinner | - |
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| dink | (noun) a soft return so that the tennis ball drops abruptly after crossing the net | Synonyms: drop shot |
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| dinkey | (noun) a small locomotive | Synonyms: dinky |
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| dinky | (noun) a small locomotive | Synonyms: dinkey |
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| dinner | (noun) the main meal of the day served in the evening or at midday | - |
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| (noun) a party of people assembled to have dinner together | Synonyms: dinner party |
| dinnertime | (noun) the customary or habitual hour for the evening meal | Synonyms: suppertime |
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| dinnerware | (noun) the tableware (plates and platters and serving bowls etc.) used in serving a meal | - |
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| dinoceras | (noun) a variety of dinocerate | Synonyms: uintathere |
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| dinocerate | (noun) an extinct ungulate | - |
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| dinoflagellate | (noun) chiefly marine protozoa having two flagella; a chief constituent of plankton | - |
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| dinosaur | (noun) any of numerous extinct terrestrial reptiles of the Mesozoic era | - |
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| dint | (noun) interchangeable with `means' in the expression `by means of' | - |
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| diocesan | (noun) a bishop having jurisdiction over a diocese | - |
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| diocese | (noun) the territorial jurisdiction of a bishop | Synonyms: bishopric, episcopate |
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| diode | (noun) a semiconductor that consists of a p-n junction | Synonyms: crystal rectifier, junction rectifier, semiconductor diode |
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| (noun) a thermionic tube having two electrodes; used as a rectifier | Synonyms: rectifying tube, rectifying valve |
| diol | (noun) any of a class of alcohols having 2 hydroxyl groups in each molecule | Synonyms: dihydric alcohol, glycol |
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| dioon | (noun) any cycad of the genus Dioon; handsome palmlike cycads with robust crowns of leaves and rugged trunks | - |
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| diopter | (noun) a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists | Synonyms: dioptre |
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| dioptre | (noun) a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists | Synonyms: diopter |
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| diorama | (noun) a picture (or series of pictures) representing a continuous scene | Synonyms: cyclorama, panorama |
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| diorite | (noun) a granular crystalline intrusive rock | - |
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| dioxide | (noun) an oxide containing two atoms of oxygen in the molecule | - |
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| dioxin | (noun) any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides | - |
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| dip | (noun) a brief swim in water | Synonyms: plunge |
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| (noun) a gymnastic exercise on the parallel bars in which the body is lowered and raised by bending and straightening the arms | - |
| (noun) a candle that is made by repeated dipping in a pool of wax or tallow | - |
| (noun) a sudden sharp decrease in some quantity | Synonyms: drop, fall, free fall |
| (noun) a brief immersion | - |
| (noun) tasty mixture or liquid into which bite-sized foods are dipped | - |
| (noun) a thief who steals from the pockets or purses of others in public places | Synonyms: cutpurse, pickpocket |
| (noun) (physics) the angle that a magnetic needle makes with the plane of the horizon | Synonyms: angle of dip, inclination, magnetic dip, magnetic inclination |
| (noun) a depression in an otherwise level surface | - |
| diphenhydramine | (noun) antihistamine (trade name Benadryl) used to treat allergic reactions involving the nasal passages (hay fever) and also to treat motion sickness | Synonyms: Benadryl |
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| diphenylhydantoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, phenytoin |
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| diphtheria | (noun) acute contagious infection caused by the bacterium Corynebacterium diphtheriae; marked by the formation of a false membrane in the throat and other air passages causing difficulty in breathing | - |
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| diphthong | (noun) a vowel sound that starts near the articulatory position for one vowel and moves toward the position for another | - |
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| diplegia | (noun) paralysis of corresponding parts on both sides of the body | - |
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| diplococcus | (noun) Gram-positive bacteria usually occurring in pairs | - |
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| diplodocus | (noun) a huge quadrupedal herbivore with long neck and tail; of late Jurassic in western North America | - |
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| diploid | (noun) (genetics) an organism or cell having the normal amount of DNA per cell; i.e., two sets of chromosomes or twice the haploid number | - |
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| diploidy | (noun) the condition of being diploid | - |
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| diploma | (noun) a document certifying the successful completion of a course of study | Synonyms: sheepskin |
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| diplomacy | (noun) subtly skillful handling of a situation | Synonyms: delicacy, discreetness, finesse |
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| (noun) wisdom in the management of public affairs | Synonyms: statecraft, statesmanship |
| (noun) negotiation between nations | Synonyms: diplomatic negotiations |
| diplomat | (noun) an official engaged in international negotiations | Synonyms: diplomatist |
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| (noun) a person who deals tactfully with others | - |
| diplomate | (noun) medical specialist whose competence has been certified by a diploma granted by an appropriate professional group | - |
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| diplomatist | (noun) an official engaged in international negotiations | Synonyms: diplomat |
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| diplopia | (noun) visual impairment in which an object is seen as two objects | Synonyms: double vision |
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| diplotene | (noun) the fourth stage of the prophase of meiosis | - |
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| dipole | (noun) an aerial half a wavelength long consisting of two rods connected to a transmission line at the center | Synonyms: dipole antenna |
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| (noun) a pair of equal and opposite electric charges or magnetic poles separated by a small distance | - |
| dipper | (noun) small North American diving duck; males have bushy head plumage | Synonyms: Bucephela albeola, bufflehead, butterball |
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| (noun) small stocky diving bird without webbed feet; frequents fast-flowing streams and feeds along the bottom | Synonyms: water ouzel |
| (noun) a ladle that has a cup with a long handle | - |
| dipsomania | (noun) an intense persistent desire to drink alcoholic beverages to excess | Synonyms: alcoholism, potomania |
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| dipsomaniac | (noun) a person who drinks alcohol to excess habitually | Synonyms: alcoholic, alky, boozer, lush, soaker, souse |
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| dipstick | (noun) a graduated rod dipped into a container to indicate the fluid level | - |
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| dipteran | (noun) insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing | Synonyms: dipteron, dipterous insect, two-winged insects |
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