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Glossary · Nouns · E

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TermTypeDefinitionClassificationsUpdated
Exodermnounthe outer germ layer that develops into skin and nervous tissueverifiedMay 18, 2026
Exodontianounthe branch of dentistry dealing with extraction of teethverifiedMay 18, 2026
Exodonticsnounthe branch of dentistry dealing with extraction of teethverifiedMay 18, 2026
Exodontistnouna dentist specializing in the extraction of teethverifiedMay 18, 2026
Exodusnouna journey by a large group to escape from a hostile environmentverifiedMay 18, 2026
Exoergic ReactionnounMWEa nuclear reaction accompanied by the evolution of energyverifiedMay 18, 2026
Exogamynounmarriage to a person belonging to a tribe or group other than your own as required by custom or lawverifiedMay 18, 2026
Exogennounflowering plant with two cotyledonsverifiedMay 18, 2026
Exogenous DepressionnounMWEan inappropriate state of depression that is precipitated by events in the person's life (to be distinguished from normal grief)verifiedMay 18, 2026
Exogenous ObesitynounMWEobesity caused by overeatingverifiedMay 18, 2026
Exomphalosnounan umbilical hernia at birth in which some abdominal organs push into the umbilical cordverifiedMay 18, 2026
Exonnounsequence of a gene's DNA that transcribes into protein structuresverifiedMay 18, 2026
Exonerationnounthe act of vindicating or defending against criticism or censure etc.verifiedMay 18, 2026
Exonucleasenouna nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acidverifiedMay 18, 2026
Exophthalmic GoiternounMWEexophthalmos occurring in association with goiterverifiedMay 18, 2026
Exophthalmosnounprotrusion of the eyeball from the socketverifiedMay 18, 2026
Exorbitancenounexcessive excessverifiedMay 18, 2026
Exorcisernounsomeone who practices exorcismverifiedMay 18, 2026
Exorcismnounfreeing from evil spiritsverifiedMay 18, 2026
Exorcistnounone of the minor orders in the unreformed Western Church but now suppressed in the Roman Catholic ChurchverifiedMay 18, 2026
Exordiumnoun(rhetoric) the introductory section of an oration or discourseverifiedMay 18, 2026
Exoskeletonnounthe exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofsverifiedMay 18, 2026
Exospherenounthe outermost atmospheric layerverifiedMay 18, 2026
Exostosisnouna benign outgrowth from a bone (usually covered with cartilage)verifiedMay 18, 2026
Exothermnouna compound that gives off heat during its formation and absorbs heat during its decompositionverifiedMay 18, 2026
Exothermic ReactionnounMWEa chemical reaction accompanied by the evolution of heatverifiedMay 18, 2026
Exotic Belly DancernounMWEa woman who performs a solo belly danceverifiedMay 18, 2026
Exotic DancernounMWEa performer who provides erotic entertainment by undressing to musicverifiedMay 18, 2026
Exoticismnounthe quality of being exoticverifiedMay 18, 2026
Exoticnessnounthe quality of being exoticverifiedMay 18, 2026
Exotismnounthe quality of being exoticverifiedMay 18, 2026
Exotoxinnouna toxin that is secreted by microorganisms into the surrounding mediumverifiedMay 18, 2026
Exotropianounstrabismus in which one or both eyes are directed outwardverifiedMay 18, 2026
Expanding UponnounMWEadding information or detailverifiedMay 18, 2026
Expansenounthe extent of a 2-dimensional surface enclosed within a boundaryverifiedMay 18, 2026
Expansionnounthe act of increasing (something) in size or volume or quantity or scopeverifiedMay 18, 2026
Expansion BitnounMWEa bit with a cutting blade that can be adjusted to different sizesverifiedMay 18, 2026
Expansion BoltnounMWEa bolt that has an attachment that expands as the bolt is driven into a surfaceverifiedMay 18, 2026
Expansion SlotnounMWE(computer) a socket in a microcomputer that will accept a plug-in circuit boardverifiedMay 18, 2026
Expansionismnounthe doctrine of expanding the territory or the economic influence of a countryverifiedMay 18, 2026
Expansive BitnounMWEa bit with a cutting blade that can be adjusted to different sizesverifiedMay 18, 2026
Expansivenessnouna quality characterized by magnificence of scale or the tendency to expandverifiedMay 18, 2026
Expansivitynounthe fractional change in length or area or volume per unit change in temperature at a given constant pressureverifiedMay 18, 2026
Expatnouna person who is voluntarily absent from home or countryverifiedMay 18, 2026
Expatiationnouna discussion (spoken or written) that enlarges on a topic or theme at length or in detailverifiedMay 18, 2026
Expatriationnounmigration from a place (especially migration from your native country in order to settle in another)verifiedMay 18, 2026
Expectancynounsomething expected (as on the basis of a norm)verifiedMay 18, 2026
expectationnounA strong belief that something will happen or be the case in the future.RequirementMay 9, 2026
Expected OutputnounMWEAny data collected from monitoring and assessments as part of the Information Security Continuous Monitoring (ISCM) strategy.DataInternalCUIMay 12, 2026
Expected ValuenounMWEthe sum of the values of a random variable divided by the number of valuesverifiedMay 18, 2026
Expectednessnounordinariness as a consequence of being expected and not surprisingverifiedMay 18, 2026
Expectorantnouna medicine promoting expectorationverifiedMay 18, 2026
Expectorationnounthe act of spitting (forcefully expelling saliva)verifiedMay 18, 2026
Expectoratornouna person who ejects saliva or phlegm from the mouthverifiedMay 18, 2026
Expediencenountaking advantage of opportunities without regard for the consequences for othersverifiedMay 18, 2026
Expediencynounthe quality of being suited to the end in viewverifiedMay 18, 2026
Expedited Funds Availability Act (EFAA)nounMWESee Regulation CC.FrameworkRegulatedMay 12, 2026
Expeditionnouna military campaign designed to achieve a specific objective in a foreign countryverifiedMay 18, 2026
Expeditiousnessnounthe property of being prompt and efficientverifiedMay 18, 2026
Expellingnounany of several bodily processes by which substances go out of the bodyverifiedMay 18, 2026
Expendernounsomeone who spends money to purchase goods or servicesverifiedMay 18, 2026
Expendingnounthe act of spending money for goods or servicesverifiedMay 18, 2026
Expenditurenounthe act of spending money for goods or servicesverifiedMay 18, 2026
expensenounThe cost required for something; the money spent on something.DataMay 9, 2026
Expense AccountnounMWEan account to which salespersons or executives can charge travel and entertainment expensesverifiedMay 18, 2026
Expense RecordnounMWEa written record of money spentverifiedMay 18, 2026
Expensivenessnounthe quality of being high-pricedverifiedMay 18, 2026
ExperimentnounA study of a fundamental physical process by the use of one or more computer simulators. Like empirical experiments, input variables (factors) are systematically changed to assess their impact upon simulator outputs (responses). Unlike empirical experiments, the simulator responses are deterministic, and this has implications: Computer experiments can appropriately have their factors with intermediate levels and the scope, especially the number of runs, can be more ambitious. Further, modeling methods based on interpolators (especially kriging) emerge as a viable approach. Good practice is to use Latin hypercubes for computer experiments, and advanced nonparametric modeling methods such as kriging, neural networks, and multivariate adaptive regression splines (MARS) in the data analysis stage. Important applications of computer experimental methods are for determining process optima and for evaluating process tolerances.ProcessMay 18, 2026
Experimental ConditionnounMWEthe procedure that is varied in order to estimate a variable's effect by comparison with a control conditionverifiedMay 18, 2026
Experimental ExtinctionnounMWEa conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulusverifiedMay 18, 2026
Experimental MethodnounMWEthe use of controlled observations and measurements to test hypothesesverifiedMay 18, 2026
Experimental ProcedurenounMWEthe specific techniques used in conducting a particular experimentverifiedMay 18, 2026
Experimental PsychologynounMWEthe branch of psychology that uses experimental methods to study psychological issuesverifiedMay 18, 2026
Experimental VariablenounMWE(statistics) a variable whose values are independent of changes in the values of other variablesverifiedMay 18, 2026
Experimentalismnounan empirical doctrine that advocates experimental principlesverifiedMay 18, 2026
Experimentationnounthe act of conducting a controlled test or investigationverifiedMay 18, 2026
Experimenternouna person who enjoys testing innovative ideasverifiedMay 18, 2026
Experimenter BiasnounMWE(psychology) bias introduced by an experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants in the experimentverifiedMay 18, 2026
Expert SystemnounMWEA computer system emulating the decision-making ability of a human expert through the use of reasoning, leveraging an encoding of domain-specific knowledge most commonly represented by sets of if-then rules rather than procedural code. The term “expert system” was used largely during the 1970s and ’80s amidst great enthusiasm about the power and promise of rule-based systems that relied on a “knowledge base” of domain-specific rules and rule-chaining procedures that map observations to conclusions or recommendations.SystemMay 18, 2026
Expert WitnessnounMWEa witness who has knowledge not normally possessed by the average person concerning the topic that he is to testify aboutverifiedMay 18, 2026
expertisenounSkill or knowledge in a particular area.CapabilityMay 12, 2026
Expertnessnounskillfulness by virtue of possessing special knowledgeverifiedMay 18, 2026
Expiationnounthe act of atoning for sin or wrongdoing (especially appeasing a deity)verifiedMay 18, 2026
Expirationnounthe act of expelling air from the lungsverifiedMay 18, 2026
Expirynounthe event of dying or departure from lifeverifiedMay 18, 2026
ExplainabilitynounA characteristic of an AI system in which there is provision of accompanying evidence or reasons for system output in a manner that is meaningful or understandable to individual users (as well as to developers and auditors) and reflects the system’s process for generating the output (e.g., what alternatives were considered, but not proposed, and why not).CapabilityMay 18, 2026
ExplainernounFunctionality for providing details on or causes for fairness metric results.SystemMay 18, 2026
Explanandumnoun(logic) a statement of something (a fact or thing or expression) to be explainedverifiedMay 18, 2026
Explanansnoun(logic) statements that explain the explicandumverifiedMay 18, 2026
Explanationnouna statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.ArtifactMay 18, 2026
Expletivenouna word or phrase conveying no independent meaning but added to fill out a sentence or metrical lineverifiedMay 18, 2026
Explicandumnoun(logic) a statement of something (a fact or thing or expression) to be explainedverifiedMay 18, 2026
Explicationnounthe act of making clear or removing obscurity from the meaning of a word or symbol or expression etc.verifiedMay 18, 2026
Explication De TextenounMWEa method of literary criticism that analyzes details of a text in order to reveal its structure and meaningverifiedMay 18, 2026
Explicit DefinitionnounMWEa definition that gives an exact equivalent of the term definedverifiedMay 18, 2026
Explicitnessnounclarity as a consequence of being explicitverifiedMay 18, 2026
Exploding CucumbernounMWEMediterranean vine having oblong fruit that when ripe expels its seeds and juice violently when touchedverifiedMay 18, 2026
ExploitnounA technique or code that uses a vulnerability to provide system access to the attacker. An exploit is an intentional attack to impact an operating system or application program.VulnerabilityMay 9, 2026
Exploit CodenounMWEA program that allows attackers to automatically break into a system.VulnerabilityRestrictedMay 12, 2026
Exploitable ChannelnounMWEChannel that allows the violation of the security policy governing an information system and is usable or detectable by subjects external to the trusted computing base. See Covert Channel.VulnerabilityRestrictedMay 12, 2026