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Glossary · Nouns · D

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TermTypeDefinitionClassificationsUpdated
Decoctionnoun(pharmacology) the extraction of water-soluble drug substances by boilingverifiedMay 18, 2026
Decoction MashingnounMWEa brewing process in which part of the mash is removed, boiled, and then returnedverifiedMay 18, 2026
Decoction ProcessnounMWE(brewing) a process in which part of the mash is removed and boiled and then returnedverifiedMay 18, 2026
Decodernounthe kind of intellectual who converts messages from a code to plain textverifiedMay 18, 2026
Decodingnounthe activity of making clear or converting from code into plain textverifiedMay 18, 2026
Decolletagenouna low-cut neckline on a woman's dressverifiedMay 18, 2026
Decolonisationnounthe action of changing from colonial to independent statusverifiedMay 18, 2026
Decolonizationnounthe action of changing from colonial to independent statusverifiedMay 18, 2026
Decommissionnounthe total or partial removal of existing components and their corresponding sub-components from Production and any relevant environment, minimizing risks and impacts, ensuring policy compliance, and maximizing the financial benefits (i.e., optimizing the cost reduction).ProcessMay 18, 2026
Decompositionnoun(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substanceverifiedMay 18, 2026
Decomposition ReactionnounMWE(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substanceverifiedMay 18, 2026
Decompound LeafnounMWEa leaf having divisions that are themselves compoundverifiedMay 18, 2026
Decompressingnounrelieving pressure (especially bringing a compressed person gradually back to atmospheric pressure)verifiedMay 18, 2026
Decompressionnounrelieving pressure (especially bringing a compressed person gradually back to atmospheric pressure)verifiedMay 18, 2026
Decompression SicknessnounMWEpain resulting from rapid change in pressureverifiedMay 18, 2026
Decongestantnouna drug that decreases pulmonary congestionverifiedMay 18, 2026
Deconstructionnouna philosophical theory of criticism (usually of literature or film) that seeks to expose deep-seated contradictions in a work by delving below its surface meaningverifiedMay 18, 2026
Deconstructionismnouna philosophical theory of criticism (usually of literature or film) that seeks to expose deep-seated contradictions in a work by delving below its surface meaningverifiedMay 18, 2026
Deconstructivismnouna school of architecture based on the philosophical theory of deconstructionverifiedMay 18, 2026
Decontaminationnounthe removal of contaminantsverifiedMay 18, 2026
Decornoundecoration consisting of the layout and furnishings of a livable interiorverifiedMay 18, 2026
Decorationnounthe act of decorating something (in the hope of making it more attractive)verifiedMay 18, 2026
Decorativenessnounan appearance that serves to decorate and make something more attractiveverifiedMay 18, 2026
Decoratornouna person who specializes in designing architectural interiors and their furnishingsverifiedMay 18, 2026
Decorousnessnounpropriety in manners and conductverifiedMay 18, 2026
Decorticationnounremoval of the outer covering of an organ or partverifiedMay 18, 2026
Decorumnounpropriety in manners and conductverifiedMay 18, 2026
Decoupagenounart produced by decorating a surface with cutouts and then coating it with several layers of varnish or lacquerverifiedMay 18, 2026
Decree NisinounMWEa decree issued on a first petition for divorceverifiedMay 18, 2026
Decrementnouna process of becoming smaller or shorterverifiedMay 18, 2026
Decrepitationnounthe crackling or breaking up of certain crystals when they are heatedverifiedMay 18, 2026
Decrepitudenouna state of deterioration due to old age or long useverifiedMay 18, 2026
Decriminalisationnounlegislation that makes something legal that was formerly illegalverifiedMay 18, 2026
Decriminalizationnounlegislation that makes something legal that was formerly illegalverifiedMay 18, 2026
decryptnounGeneric term encompassing decode and decipher.CapabilityMay 12, 2026
DecryptionnounThe process of changing ciphertext into plaintext using a cryptographic algorithm and key.ProcessMay 12, 2026
Decryption keynounMWEA digital piece of information used to recover plaintext from the corresponding ciphertext by decryptionCredentialRestrictedMay 9, 2026
Decubitusnouna reclining position (as in a bed)verifiedMay 18, 2026
Decubitus UlcernounMWEa chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients)verifiedMay 18, 2026
Decumarynounwoody climber of southeastern United States having white flowers in compound terminal clustersverifiedMay 18, 2026
Decussationnounan intersection or crossing of two tracts in the form of the letter XverifiedMay 18, 2026
Dedicated File ServernounMWE(computer science) a file server that can be used only as a file serververifiedMay 18, 2026
Dedicated ModenounMWEInformation systems security mode of operation wherein each user, with direct or indirect access to the system, its peripherals, remote terminals, or remote hosts, has all of the following: 1. valid security clearance for all information within the system, 2. formal access approval and signed nondisclosure agreements for all the information stored and/or processed (including all compartments, subcompartments, and/or special access programs), and 3. valid need-to-know for all information contained within the information system. When in the dedicated security mode, a system is specifically and exclusively dedicated to and controlled for the processing of one particular type or classification of information, either for full-time operation or for a specified period of time.RequirementRegulatedCUIMay 9, 2026
Dedicationnouna short message (as in a book or musical work or on a photograph) dedicating it to someone or somethingverifiedMay 18, 2026
Dedifferentiationnounthe loss of specialization in form or functionverifiedMay 18, 2026
Deductionnounreasoning from the general to the particular (or from cause to effect)verifiedMay 18, 2026
Deductive AnalyticsnounMWEInsights, reporting, and information answering the question, "What would likely happen IF…?” Deductive analytics evaluates causes and outcomes of possible future events.CapabilityMay 18, 2026
Deductive ReasoningnounMWEreasoning from the general to the particular (or from cause to effect)verifiedMay 18, 2026
Deednouna legal document signed, sealed and delivered to effect a transfer of property and to show the legal right to possess itverifiedMay 18, 2026
Deed of ConveyancenounMWEa legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess itverifiedMay 18, 2026
Deed of TrustnounMWEa written instrument legally conveying property to a trustee often used to secure an obligation such as a mortgage or promissory noteverifiedMay 18, 2026
Deed PollnounMWEa deed made and executed by only one partyverifiedMay 18, 2026
Deedboxnouna strongly made box for holding money or valuablesverifiedMay 18, 2026
Deep BrownnounMWEa medium brown to dark-brown colorverifiedMay 18, 2026
Deep Cervical VeinnounMWEa vein that accompanies an artery of the same nameverifiedMay 18, 2026
Deep FordingnounMWEfording at a deep place in the streamverifiedMay 18, 2026
Deep FreezernounMWEelectric refrigerator (trade name Deepfreeze) in which food is frozen and stored for long periods of timeverifiedMay 18, 2026
Deep KissnounMWEan openmouthed kiss in which your tongue is inserted into the other's mouthverifiedMay 18, 2026
Deep LearningnounMWEDeep learning is a broad family of techniques for machine learning in which hypotheses take the form of complex algebraic circuits with tunable connection strengths. The word “deep” refers to the fact that the circuits are typically organized into many layers, which means that computation paths from inputs to outputs have many steps. Deep learning is currently the most widely used approach for applications such as visual object recognition, machine translation, speech recognition, speech synthesis, and image synthesis; it also plays a significant role in reinforcement learning applications.CapabilityMay 18, 2026
Deep Middle Cerebral VeinnounMWEaccompanies the middle cerebral artery deep in the Sylvian fissureverifiedMay 18, 2026
Deep packet inspectionnounMWEThe capability to analyze network traffic to compare vendor-developed profiles of benign protocol activity against observed events to identify deviations.CapabilityMay 9, 2026
Deep PocketnounMWEa source of substantial wealth (usually plural)verifiedMay 18, 2026
Deep RednounMWEa deep and vivid red colorverifiedMay 18, 2026
Deep SpacenounMWEany region in space outside the solar systemverifiedMay 18, 2026
Deep Supporting FirenounMWEfire on objectives not in the immediate vicinity of your forces but with the objective of destroying enemy reserves and weapons and interfering with the enemy command and supply and communicationsverifiedMay 18, 2026
Deep Temporal VeinnounMWEtemporal veins that empty into the pterygoid plexusverifiedMay 18, 2026
Deep WaternounMWEserious troubleverifiedMay 18, 2026
Deep-Dish PienounMWEa pie made of fruit with rich biscuit dough usually only on top of the fruitverifiedMay 18, 2026
Deep-Freezenounelectric refrigerator (trade name Deepfreeze) in which food is frozen and stored for long periods of timeverifiedMay 18, 2026
Deep-Sea DivernounMWEa diver in the deeper parts of the seaverifiedMay 18, 2026
DeepfakenounAI-generated or manipulated image, audio or video content that resembles existing persons, objects, places or other entities or events and would falsely appear to a person to be authentic or truthful.ThreatRegulatedMay 18, 2026
Deepnessnounthe intellectual ability to penetrate deeply into ideasverifiedMay 18, 2026
Deepwater PipefishnounMWEa fish 8 inches longverifiedMay 18, 2026
Deepwater SquirrelfishnounMWEa squirrelfish found from South Carolina to Bermuda and Gulf of MexicoverifiedMay 18, 2026
Deernoundistinguished from Bovidae by the male's having solid deciduous antlersverifiedMay 18, 2026
Deer FernnounMWEfern with erect fronds of Europe and western North AmericaverifiedMay 18, 2026
Deer Fly FevernounMWEa highly infectious disease of rodents (especially rabbits and squirrels) and sometimes transmitted to humans by ticks or flies or by handling infected animalsverifiedMay 18, 2026
Deer GrassnounMWEany of several plants of the genus Rhexia usually having pink-purple to magenta flowersverifiedMay 18, 2026
Deer HuntnounMWEhunting deerverifiedMay 18, 2026
Deer HunternounMWEhunter of deerverifiedMay 18, 2026
Deer HuntingnounMWEhunting deerverifiedMay 18, 2026
Deer MousenounMWEbrownish New World mouseverifiedMay 18, 2026
Deer MushroomnounMWEa small edible agaric with a slender stalkverifiedMay 18, 2026
Deer TrailnounMWEa trail worn by the passage of deerverifiedMay 18, 2026
Deer's-Earnounany of various tall perennial herbs constituting the genus FraseraverifiedMay 18, 2026
Deerberrynounsmall branching blueberry common in marshy areas of the eastern United States having greenish or yellowish unpalatable berries reputedly eaten by deerverifiedMay 18, 2026
Deerhoundnounvery large and tall rough-coated dog bred for hunting deerverifiedMay 18, 2026
Deerskinnounleather from the hide of a deerverifiedMay 18, 2026
Deerstalkernouna tight-fitting hat with visors front and backverifiedMay 18, 2026
Deerstalkingnounstalking deerverifiedMay 18, 2026
DefacementnounDefacement is the method of modifying the content of a website in such a way that it becomes "vandalized" or embarrassing to the website owner.ThreatMay 12, 2026
Defalcationnounthe fraudulent appropriation of funds or property entrusted to your care but actually owned by someone elseverifiedMay 18, 2026
Defalcatornounsomeone who violates a trust by taking (money) for his own useverifiedMay 18, 2026
Defamationnouna false accusation of an offense or a malicious misrepresentation of someone's words or actionsverifiedMay 18, 2026
Defamernounone who attacks the reputation of another by slander or libelverifiedMay 18, 2026
Default ClassificationnounMWEClassification reflecting the highest classification being processed in an information system. Default classification is included in the caution statement affixed to an object.RequirementRegulatedCUIMay 9, 2026
Default JudgementnounMWEa judgment entered in favor of the plaintiff when the defendant defaults (fails to appear in court)verifiedMay 18, 2026
Default JudgmentnounMWEa judgment entered in favor of the plaintiff when the defendant fails to appear in courtverifiedMay 18, 2026
Default OptionnounMWEan option that is selected automatically unless an alternative is specifiedverifiedMay 18, 2026
default passwordnounMWEPassword on system administration, user, or service accounts predefined in a system, application, or device; usually associated with default account. Default accounts and passwords are published and well known, and therefore easily guessed.CredentialMay 9, 2026