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Glossary · Nouns · D

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TermTypeDefinitionClassificationsUpdated
Decadencenounthe state of being degenerate in mental or moral qualitiesverifiedMay 18, 2026
Decadencynounthe state of being degenerate in mental or moral qualitiesverifiedMay 18, 2026
Decafnouncoffee with the caffeine removedverifiedMay 18, 2026
Decagonnouna polygon with 10 sides and 10 anglesverifiedMay 18, 2026
Decagramnoun10 gramsverifiedMay 18, 2026
Decahedronnounany polyhedron having ten plane facesverifiedMay 18, 2026
Decalnouneither a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surfaceverifiedMay 18, 2026
Decalcificationnounloss of calcium from bones or teethverifiedMay 18, 2026
Decalcomanianouneither a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surfaceverifiedMay 18, 2026
Decalescencenounphenomenon that occurs when a metal is being heated and there is a sudden slowing in the rate of temperature increaseverifiedMay 18, 2026
Decaliternouna metric unit of volume or capacity equal to 10 litersverifiedMay 18, 2026
Decalitrenouna metric unit of volume or capacity equal to 10 litersverifiedMay 18, 2026
Decameternouna metric unit of length equal to ten metersverifiedMay 18, 2026
Decametrenouna metric unit of length equal to ten metersverifiedMay 18, 2026
Decampmentnounthe act of running away secretly, as to avoid arrestverifiedMay 18, 2026
Decanedioic AcidnounMWEa dicarboxylic acid used to make resinsverifiedMay 18, 2026
Decanoic AcidnounMWEa fatty acid found in animal oils and fatsverifiedMay 18, 2026
Decantationnounthe act of gently pouring off a clear liquor (as from its original bottle) without disturbing the leesverifiedMay 18, 2026
Decanternouna bottle with a stopperverifiedMay 18, 2026
Decapitationnounexecution by cutting off the victim's headverifiedMay 18, 2026
Decapodnouncrustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thoraxverifiedMay 18, 2026
Decapod CrustaceannounMWEcrustaceans characteristically having five pairs of locomotor appendages each joined to a segment of the thoraxverifiedMay 18, 2026
DecapsulationnounDecapsulation is the process of stripping off one layer's headers and passing the rest of the packet up to the next higher layer on the protocol stack.ProcessMay 12, 2026
Decarboxylasenounany of the enzymes that hydrolize the carboxyl groupverifiedMay 18, 2026
Decarboxylationnounthe process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen)verifiedMay 18, 2026
Decasyllablenouna verse line having ten syllablesverifiedMay 18, 2026
Decathlonnounan athletic contest consisting of ten different eventsverifiedMay 18, 2026
Deccan HempnounMWEvaluable fiber plant of East Indies now widespread in cultivationverifiedMay 18, 2026
Deceased PersonnounMWEsomeone who is no longer aliveverifiedMay 18, 2026
Decedentnounsomeone who is no longer aliveverifiedMay 18, 2026
Deceitnounthe quality of being fraudulentverifiedMay 18, 2026
Deceitfulnessnounthe quality of being craftyverifiedMay 18, 2026
Deceivernounsomeone who leads you to believe something that is not trueverifiedMay 18, 2026
Decelerationnoun(physics) a rate of decrease in velocityverifiedMay 18, 2026
Decencynounthe quality of conforming to standards of propriety and moralityverifiedMay 18, 2026
Decennarynouna period of 10 yearsverifiedMay 18, 2026
Decenniumnouna period of 10 yearsverifiedMay 18, 2026
Decentalisationnounthe social process in which population and industry moves from urban centers to outlying districtsverifiedMay 18, 2026
Decentralisationnounthe dilution of power away from a central controller, often used with governmentsverifiedMay 18, 2026
DecentralizationnounThe process of distributing computer processing to different locations within an enterpriseProcessMay 12, 2026
Deceptionnouna misleading falsehoodverifiedMay 18, 2026
Deceptivenessnounthe quality of being deceptiveverifiedMay 18, 2026
DecertificationnounRevocation of the certification of an information system item or equipment for cause.EventRegulatedMay 9, 2026
Decibelnouna logarithmic unit of sound intensityverifiedMay 18, 2026
Deciduanounthe epithelial tissue of the endometriumverifiedMay 18, 2026
Deciduous HollynounMWEa holly treeverifiedMay 18, 2026
Deciduous PlantnounMWEa plant having foliage that is shed annually at the end of the growing seasonverifiedMay 18, 2026
Deciduous ToothnounMWEone of the first temporary teeth of a young mammal (one of 20 in children)verifiedMay 18, 2026
Decigramnoun1/10 gramverifiedMay 18, 2026
Decilenoun(statistics) any of nine points that divided a distribution of ranked scores into equal intervals where each interval contains one-tenth of the scoresverifiedMay 18, 2026
Deciliternouna metric unit of volume equal to one tenth of a literverifiedMay 18, 2026
Decilitrenouna metric unit of volume equal to one tenth of a literverifiedMay 18, 2026
Decimal DigitnounMWEa digit from 0 to 9 in decimal notationverifiedMay 18, 2026
Decimal FractionnounMWEa proper fraction whose denominator is a power of 10verifiedMay 18, 2026
Decimal NotationnounMWEany notation that uses 10 different characters (usually the digits 0 to 9)verifiedMay 18, 2026
Decimal Number SystemnounMWEa positional system of numeration that uses decimal digits and a base of tenverifiedMay 18, 2026
Decimal Numeration SystemnounMWEa positional system of numeration that uses decimal digits and a base of tenverifiedMay 18, 2026
Decimal PointnounMWEthe dot at the left of a decimal fractionverifiedMay 18, 2026
Decimal SystemnounMWEa positional system of numeration that uses decimal digits and a base of tenverifiedMay 18, 2026
Decimal System of ClassificationnounMWEa system used by libraries to classify nonfictional publications into subject categoriesverifiedMay 18, 2026
Decimalisationnounthe act of changing to a decimal systemverifiedMay 18, 2026
Decimalizationnounthe act of changing to a decimal systemverifiedMay 18, 2026
Decimationnoundestroying or killing a large part of the population (literally every tenth person as chosen by lot)verifiedMay 18, 2026
Decimeternouna metric unit of length equal to one tenth of a meterverifiedMay 18, 2026
Decimetrenouna metric unit of length equal to one tenth of a meterverifiedMay 18, 2026
Decipherernounthe kind of intellectual who converts messages from a code to plain textverifiedMay 18, 2026
Deciphermentnounthe activity of making clear or converting from code into plain textverifiedMay 18, 2026
decisionnounA position or opinion or judgment reached after consideration.ArtifactMay 9, 2026
Decision MakernounMWEsomeone who administers a businessverifiedMay 18, 2026
Decision PointnounMWEA point within a business process where the process flow can take one of several alternative paths, including recursive.ArtifactMay 18, 2026
Decision Support SystemnounMWEa computer program application used to improve a company's decision-making capabilities. It analyzes large amounts of data and presents an organization with the best possible options available[; they] bring together data and knowledge from different areas and sources to provide users with information beyond the usual reports and summaries. This is intended to help people make informed decisions.CapabilityMay 18, 2026
Decision TablenounMWEa table of all contingencies and the actions to be taken for eachverifiedMay 18, 2026
Decision TreenounMWETree‐structure resembling a flowchart, where every node represents a test to an attribute, each branch represents the possible outcomes of that test, and the leaves represent the class labels.ArtifactMay 18, 2026
decision-makingnounThe action or process of reaching important conclusions or resolutions after consideration; action or process of making important decisions.ProcessMay 9, 2026
decision-making rolenounMWEThe person in the organization that makes organizational decisions.RoleMay 9, 2026
Decisive FactornounMWEa point or fact or remark that settles something conclusivelyverifiedMay 18, 2026
Decisivenessnounthe trait of resoluteness as evidenced by firmness of character or purposeverifiedMay 18, 2026
Deck ChairnounMWEa folding chair for use outdoorsverifiedMay 18, 2026
Deck of CardsnounMWEa pack of 52 playing cardsverifiedMay 18, 2026
Deck TennisnounMWEgame played mainly on board ocean linersverifiedMay 18, 2026
Deck-Housenouna superstructure on the upper deck of a shipverifiedMay 18, 2026
Deckernoun(often used in combinations) something constructed with multiple levelsverifiedMay 18, 2026
Deckhandnouna member of a ship's crew who performs manual laborverifiedMay 18, 2026
Decklenounrough edge left by a deckle on handmade paper or produced artificially on machine-made paperverifiedMay 18, 2026
Deckle EdgenounMWErough edge left by a deckle on handmade paper or produced artificially on machine-made paperverifiedMay 18, 2026
Declamationnounrecitation of a speech from memory with studied gestures and intonation as an exercise in elocution or rhetoricverifiedMay 18, 2026
Declarationnoun(contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must makeverifiedMay 18, 2026
Declaration of Estimated TaxnounMWEreturn required of a taxpayer whose tax withheld from income does not meet the tax liability for the yearverifiedMay 18, 2026
Declarative MoodnounMWEa mood (grammatically unmarked) that represents the act or state as an objective factverifiedMay 18, 2026
Declarative SentencenounMWEa sentence (in the indicative mood) that makes a declarationverifiedMay 18, 2026
Declaratory SentencenounMWEa sentence (in the indicative mood) that makes a declarationverifiedMay 18, 2026
Declarernounthe bridge player in contract bridge who wins the bidding and can declare which suit is to be trumpsverifiedMay 18, 2026
Declassificationnounreduction or removal by the government of restrictions on a classified document or weaponverifiedMay 18, 2026
Declensionnouna class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional formsverifiedMay 18, 2026
Declinationnoun(astronomy) the angular distance of a celestial body north or to the south of the celestial equatorverifiedMay 18, 2026
Decline in QualitynounMWEprocess of changing to an inferior stateverifiedMay 18, 2026
Declinometernounan instrument for measuring magnetic declinationverifiedMay 18, 2026
Declivitynouna downward slope or bendverifiedMay 18, 2026
Deconouna style of design that was popular in the 1920s and 1930sverifiedMay 18, 2026
Decoagulantnounmedicine that prevents or retards the clotting of bloodverifiedMay 18, 2026