| deracination | (noun) the act of pulling up or out; uprooting; cutting off from existence | Synonyms: excision, extirpation |
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| (noun) to move something from its natural environment | Synonyms: displacement |
| derailment | (noun) an accident in which a train runs off its track | - |
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| derangement | (noun) the act of disturbing the mind or body | Synonyms: overthrow, upset |
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| (noun) a state of mental disturbance and disorientation | Synonyms: mental unsoundness, unbalance |
| derby | (noun) a felt hat that is round and hard with a narrow brim | Synonyms: bowler, bowler hat, derby hat, plug hat |
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| deregulating | (noun) the act of freeing from regulation (especially from governmental regulations) | Synonyms: deregulation |
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| deregulation | (noun) the act of freeing from regulation (especially from governmental regulations) | Synonyms: deregulating |
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| derelict | (noun) a ship abandoned on the high seas | Synonyms: abandoned ship |
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| (noun) a person without a home, job, or property | - |
| dereliction | (noun) willful negligence | - |
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| (noun) a tendency to be negligent and uncaring | Synonyms: delinquency, willful neglect |
| derision | (noun) the act of deriding or treating with contempt | Synonyms: ridicule |
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| (noun) contemptuous laughter | - |
| derivation | (noun) the act of deriving something or obtaining something from a source or origin | - |
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| (noun) drawing off water from its main channel as for irrigation | - |
| (noun) drawing of fluid or inflammation away from a diseased part of the body | - |
| (noun) inherited properties shared with others of your bloodline | Synonyms: ancestry, filiation, lineage |
| (noun) a line of reasoning that shows how a conclusion follows logically from accepted propositions | - |
| (noun) (historical linguistics) an explanation of the historical origins of a word or phrase | Synonyms: deriving, etymologizing |
| (noun) the source or origin from which something derives (i.e. comes or issues) | - |
| (noun) (descriptive linguistics) the process whereby new words are formed from existing words or bases by affixation | - |
| derivative | (noun) the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx | Synonyms: derived function, differential, differential coefficient, first derivative |
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| (noun) (linguistics) a word that is derived from another word | - |
| (noun) a financial instrument whose value is based on another security | Synonyms: derivative instrument |
| (noun) a compound obtained from, or regarded as derived from, another compound | - |
| deriving | (noun) (historical linguistics) an explanation of the historical origins of a word or phrase | Synonyms: derivation, etymologizing |
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| derma | (noun) the deep vascular inner layer of the skin | Synonyms: corium, dermis |
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| dermabrasion | (noun) removal of scars or tattoos by anesthetizing the skin surface and then sanding or scraping off some of the outer skin layer | - |
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| dermatitis | (noun) inflammation of the skin; skin becomes itchy and may develop blisters | - |
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| dermatoglyphic | (noun) the lines that form patterns on the skin (especially on the fingertips and the palms of the hands and the soles of the feet) | - |
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| dermatoglyphics | (noun) the study of the whorls and loops and arches in the fingertips and on the palms of the hand and the soles of the feet | - |
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| dermatologist | (noun) a doctor who specializes in the physiology and pathology of the skin | Synonyms: skin doctor |
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| dermatology | (noun) the branch of medicine dealing with the skin and its diseases | - |
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| dermatome | (noun) a surgical instrument used to cut very thin slices of skin | - |
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| dermatomycosis | (noun) fungal infection of the skin (especially of moist parts covered by clothing) | Synonyms: dermatophytosis |
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| dermatomyositis | (noun) myositis characterized by weakness of limb and neck muscles and much muscle pain and swelling accompanied by skin rash affecting cheeks and eyelids and neck and chest and limbs; progression and severity vary among individuals | - |
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| dermatophytosis | (noun) fungal infection of the skin (especially of moist parts covered by clothing) | Synonyms: dermatomycosis |
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| dermatosclerosis | (noun) an autoimmune disease that affects the blood vessels and connective tissue; fibrous connective tissue is deposited in the skin | Synonyms: scleroderma |
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| dermatosis | (noun) disorder involving lesions or eruptions of the skin (in which there is usually no inflammation) | - |
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| dermis | (noun) the deep vascular inner layer of the skin | Synonyms: corium, derma |
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| derogation | (noun) (law) the partial taking away of the effectiveness of a law; a partial repeal or abolition of a law | - |
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| (noun) a communication that belittles somebody or something | Synonyms: depreciation, disparagement |
| derp | (noun) someone who is silly or stupid especially when seeming cute | - |
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| derrick | (noun) a simple crane having lifting tackle slung from a boom | - |
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| (noun) a framework erected over an oil well to allow drill tubes to be raised and lowered | - |
| derriere | (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
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| derringer | (noun) a pocket pistol of large caliber with a short barrel | - |
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| derris | (noun) any of various usually woody vines of the genus Derris of tropical Asia whose roots yield the insecticide rotenone; several are sources of native fish and arrow poisons | - |
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| derv | (noun) diesel oil used in cars and lorries with diesel engines; from d(iesel) e(ngine) r(oad) v(ehicle) | - |
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| dervish | (noun) an ascetic Muslim monk; a member of an order noted for devotional exercises involving bodily movements | - |
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