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Glossary · Nouns · D

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TermTypeDefinitionClassificationsUpdated
Degree CentigradenounMWEa degree on the centigrade scale of temperatureverifiedMay 18, 2026
Degree DaynounMWEa unit used in estimating fuel requirements for heating a buildingverifiedMay 18, 2026
Degree FahrenheitnounMWEa degree on the Fahrenheit scale of temperatureverifiedMay 18, 2026
Degree of a PolynomialnounMWEthe degree of the term in the polynomial that has the highest degreeverifiedMay 18, 2026
Degree of a TermnounMWEthe sum of the exponents of the variables in the termverifiedMay 18, 2026
Degree of FreedomnounMWEone of the minimum number of parameters needed to describe the state of a physical systemverifiedMay 18, 2026
Degree ProgramnounMWEa course of study leading to an academic degreeverifiedMay 18, 2026
Degressive TaxnounMWEany tax in which the rate decreases as the amount subject to taxation increasesverifiedMay 18, 2026
Degustationnountaking a small amount into the mouth to test its qualityverifiedMay 18, 2026
Dehiscencenoun(biology) release of material by splitting open of an organ or tissueverifiedMay 18, 2026
Dehumanisationnounthe act of degrading people with respect to their best qualitiesverifiedMay 18, 2026
Dehumanizationnounthe act of degrading people with respect to their best qualitiesverifiedMay 18, 2026
Dehydrated FoodnounMWEfood preserved by dehydrationverifiedMay 18, 2026
Dehydrationnoundryness resulting from the removal of waterverifiedMay 18, 2026
Dehydroretinolnouna viscous alcohol that is less active in mammals than is vitamin A1verifiedMay 18, 2026
Deicernounheater that removes ice or frost (as from a windshield or a refrigerator or the wings of an airplane)verifiedMay 18, 2026
Deictic WordnounMWEa word specifying identity or spatial or temporal location from the perspective of a speaker or hearer in the context in which the communication occursverifiedMay 18, 2026
Deificationnounthe elevation of a person to a god-like statusverifiedMay 18, 2026
Deinocheirusnounlightly built medium-sized theropod with long limbs and neckverifiedMay 18, 2026
Deinonychusnounswift agile wolf-sized bipedal dinosaur having a large curved claw on each hind footverifiedMay 18, 2026
Deipnosophistnounsomeone skilled at informal chitchatverifiedMay 18, 2026
Deismnounthe form of theological rationalism that believes in God on the basis of reason without reference to revelationverifiedMay 18, 2026
Deitynounany supernatural being worshipped as controlling some part of the world or some aspect of life or who is the personification of a forceverifiedMay 18, 2026
Deixisnounthe function of pointing or specifying from the perspective of a participant in an act of speech or writingverifiedMay 18, 2026
Deja VunounMWEthe experience of thinking that a new situation had occurred beforeverifiedMay 18, 2026
Dejectednessnouna feeling of low spiritsverifiedMay 18, 2026
Dejectionnounsolid excretory product evacuated from the bowelsverifiedMay 18, 2026
Dejeunernouna midday mealverifiedMay 18, 2026
Dekagramnoun10 gramsverifiedMay 18, 2026
Dekaliternouna metric unit of volume or capacity equal to 10 litersverifiedMay 18, 2026
Dekalitrenouna metric unit of volume or capacity equal to 10 litersverifiedMay 18, 2026
Dekameternouna metric unit of length equal to ten metersverifiedMay 18, 2026
Dekametrenouna metric unit of length equal to ten metersverifiedMay 18, 2026
DekkonounBritish slang for a lookverifiedMay 18, 2026
Delavirdinenouna non-nucleoside reverse transcriptase inhibitor (trade name Rescriptor) used to treat AIDS and HIVverifiedMay 18, 2026
Delay LinenounMWEa circuit designed to introduce a calculated delay into the transmission of a signalverifiedMay 18, 2026
Delayed ActionnounMWEa mechanism that automatically delays the release of a camera shutter for a fixed period of time so that the photographer can appear in the pictureverifiedMay 18, 2026
Delayed AllergynounMWEan allergic reaction that becomes apparent only hours after contactverifiedMay 18, 2026
Delayernouna person who delaysverifiedMay 18, 2026
Delectabilitynounextreme appetizingnessverifiedMay 18, 2026
Delectationnouna feeling of extreme pleasure or satisfactionverifiedMay 18, 2026
Delegacynounthe state of serving as an official and authorized delegate or agentverifiedMay 18, 2026
Delegated Development ProgramnounMWEINFOSEC program in which the Director, NSA, delegates, on a case-by-case basis, the development and/or production of an entire telecommunications product, including the INFOSEC portion, to a lead department or agency.ProcessRegulatedCUIMay 9, 2026
Delegatingnounauthorizing subordinates to make certain decisionsverifiedMay 18, 2026
delegationnounAuthorizing subordinates to make certain decisions.ProcessMay 9, 2026
delegation procedurenounMWEA detailed description of the steps necessary to assign a task or responsibility to another role in conformance with applicable standards.RequirementMay 9, 2026
Deleted FilenounMWEA file that has been logically, but not necessarily physically, erased from the operating system, perhaps to eliminate potentially incriminating evidence. Deleting files does not always necessarily eliminate the possibility of recovering all or part of the original data.DataMay 12, 2026
Deletionnounthe omission that is made when an editorial change shortens a written passageProcessMay 18, 2026
Delfnounan excavationverifiedMay 18, 2026
Delftnouna style of glazed earthenwareverifiedMay 18, 2026
Delinouna shop selling ready-to-eat food productsverifiedMay 18, 2026
Deliberate DefencenounMWEa defense organized before contact is made with the enemy and while time for organization is availableverifiedMay 18, 2026
Deliberate DefensenounMWEa defense organized before contact is made with the enemy and while time for organization is availableverifiedMay 18, 2026
Deliberatenessnounthe trait of thoughtfulness in action or decisionverifiedMay 18, 2026
Deliberationnouna discussion of all sides of a question, usually pluralverifiedMay 18, 2026
Deliberative AssemblynounMWEan assembly of people for the purpose of unhurried consideration and discussionverifiedMay 18, 2026
Delicacynounthe quality of being beautiful and delicate in appearanceverifiedMay 18, 2026
Delicatessennouna shop selling ready-to-eat food productsverifiedMay 18, 2026
Delicatessen FoodnounMWEready-to-eat food productsverifiedMay 18, 2026
Deliciousnessnounextreme appetizingnessverifiedMay 18, 2026
Delimitationnouna line that indicates a boundaryverifiedMay 18, 2026
Delineationnouna drawing of the outlines of forms or objectsverifiedMay 18, 2026
Delinquencynounan antisocial misdeed in violation of the law by a minorverifiedMay 18, 2026
Deliquiumnouna spontaneous loss of consciousness caused by insufficient blood to the brainverifiedMay 18, 2026
Deliriumnouna usually brief state of excitement and mental confusion often accompanied by hallucinationsverifiedMay 18, 2026
Delirium TremensnounMWEacute delirium caused by alcohol poisoningverifiedMay 18, 2026
DeliverablenounA project goal or expectation. Deliverables include broadly-defined, project or phase requirements and specifically-defined tasks within project phases.ArtifactMay 9, 2026
Deliverancenounrecovery or preservation from loss or dangerverifiedMay 18, 2026
Deliverernouna person who gives up or transfers money or goodsverifiedMay 18, 2026
deliverynounThe supply or provision of something.ProcessMay 9, 2026
Delivery BoynounMWEsomeone employed to make deliveriesverifiedMay 18, 2026
Delivery TrucknounMWEa van suitable for delivering goods or services to customersverifiedMay 18, 2026
Delivery VannounMWEa van suitable for delivering goods or services to customersverifiedMay 18, 2026
Deliverymannounsomeone employed to make deliveriesverifiedMay 18, 2026
Dellnouna small wooded hollowverifiedMay 18, 2026
Delmonico SteaknounMWEsmall steak from the front of the short loin of beefverifiedMay 18, 2026
Delphiniumnounany plant of the genus Delphinium having palmately divided leaves and showy spikes of variously colored spurred flowersverifiedMay 18, 2026
Deltanouna low triangular area of alluvial deposits where a river divides before entering a larger body of waterverifiedMay 18, 2026
Delta HepatitisnounMWEa severe form of hepatitisverifiedMay 18, 2026
Delta IronnounMWEan allotrope of iron that is stable between 1403 degrees centigrade and the melting point (= 1532 degrees)verifiedMay 18, 2026
Delta RaynounMWEan electron ejected from matter by ionizing radiationverifiedMay 18, 2026
Delta RhythmnounMWEthe normal brainwave in the encephalogram of a person in deep dreamless sleepverifiedMay 18, 2026
Delta WavenounMWEthe normal brainwave in the encephalogram of a person in deep dreamless sleepverifiedMay 18, 2026
Delta WingnounMWEan airplane with wings that give it the appearance of an isosceles triangleverifiedMay 18, 2026
Deltoid EminencenounMWEa bump on the outside of the humerus where the deltoid muscle attachesverifiedMay 18, 2026
Deltoid LeafnounMWEa simple leaf shaped like a capital deltaverifiedMay 18, 2026
Deltoid MusclenounMWEa large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the armverifiedMay 18, 2026
Deltoid TuberositynounMWEa bump on the outside of the humerus where the deltoid muscle attachesverifiedMay 18, 2026
Delusionnoun(psychology) an erroneous belief that is held in the face of evidence to the contraryverifiedMay 18, 2026
Delusional DisordernounMWEany mental disorder in which delusions play a significant roleverifiedMay 18, 2026
Delusions of GrandeurnounMWEa delusion (common in paranoia) that you are much greater and more powerful and influential than you really areverifiedMay 18, 2026
Delusions of PersecutionnounMWEa delusion (common in paranoia) that others are out to get you and frustrate and embarrass you or inflict suffering on youverifiedMay 18, 2026
Demagnetisationnounthe process of removing magnetizationverifiedMay 18, 2026
Demagnetizationnounthe process of removing magnetizationverifiedMay 18, 2026
Demagognouna political leader who seeks support by appealing to popular passions and prejudicesverifiedMay 18, 2026
Demagoguenouna political leader who seeks support by appealing to popular passions and prejudicesverifiedMay 18, 2026
Demagoguerynounimpassioned appeals to the prejudices and emotions of the populaceverifiedMay 18, 2026
Demagogynounimpassioned appeals to the prejudices and emotions of the populaceverifiedMay 18, 2026
Demand DepositnounMWEa bank deposit from which withdrawals can be made without noticeverifiedMay 18, 2026
Demand FeedingnounMWEfeeding a baby or animal whenever it shows a needverifiedMay 18, 2026