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Glossary · Nouns · E

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TermTypeDefinitionClassificationsUpdated
External Iliac ArterynounMWEthe outer branch of the common iliac artery on either side of the bodyverifiedMay 18, 2026
External Iliac VeinnounMWEa continuation of the femoral veinverifiedMay 18, 2026
external information systemnounMWEAn information system or component of an information system that is outside of the accreditation boundary established by the organization and for which the organization typically has no direct control over the application of required security controls or the assessment of security control effectiveness.SystemRegulatedMay 9, 2026
External Information System or ComponentnounMWEAn information system or component of an information system that is outside of the authorization boundary established by the organization and for which the organization typically has no direct control over the application of required security controls or the assessment of security control effectiveness.SystemRegulatedMay 9, 2026
External Information System ServicenounMWEAn information system service that is implemented outside of the authorization boundary of the organizational information system (i.e., a service that is used by, but not a part of, the organizational information system) and for which the organization typically has no direct control over the application of required security controls or the assessment of security control effectiveness.SystemRegulatedMay 12, 2026
External Information System Service ProvidernounMWEA provider of external information system services to an organization through a variety of consumer-producer relationships, including but not limited to: joint ventures; business partnerships; outsourcing arrangements (i.e., through contracts, interagency agreements, lines of business arrangements); licensing agreements; and/or supply chain exchanges.OrganizationRegulatedMay 12, 2026
External Jugular VeinnounMWEformed by the junction of the posterior auricular and the retromandibular veinsverifiedMay 18, 2026
External Maxillary ArterynounMWEan artery that originates in the external carotid and gives off branches that supply the neck and faceverifiedMay 18, 2026
External Nasal VeinnounMWEone of the veins that drain the external nose and empty into the angular or facial veinverifiedMay 18, 2026
External NetworknounMWEA network not controlled by the organization.NetworkMay 12, 2026
External Oblique MusclenounMWEa diagonally arranged abdominal muscle on either side of the torsoverifiedMay 18, 2026
External OrgannounMWEan organ that is situated on or near the surface of the bodyverifiedMay 18, 2026
External OrificenounMWEthe orifice through which urine is dischargedverifiedMay 18, 2026
external requirementnounMWEAny law, contractual obligation, code of connection, service level agreement, or even international agreement.RequirementRegulatedMay 9, 2026
External RespirationnounMWEthe bodily process of inhalation and exhalationverifiedMay 18, 2026
external routable connectivitynounMWEThe ability to access a Bulk Electric System Cyber System from a Cyber Asset that is outside of its associated Electronic Security Perimeter via a bi-directional routable protocol connection.NetworkRegulatedMay 9, 2026
External Security TestingnounMWESecurity testing conducted from outside the organization’s security perimeter.ProcessMay 12, 2026
external service providernounMWEAn independent business that provides its services to other business.OrganizationMay 12, 2026
External StoragenounMWEa data storage device that is not the main memory of a computerverifiedMay 18, 2026
external usernounMWEIndividuals that are non-workforce members or personnel who are authorized by customers, entity management, or other authorized persons to interact with the system.IdentityRegulatedMay 9, 2026
External ValiditynounMWEthe extent to which the results of research or testing can be generalized beyond the sample that generated them. The more specialized the sample, the less likely will it be that the results are highly generalizable to other individuals, situations, and time periods.MetricMay 18, 2026
External-Combustion EnginenounMWEa heat engine in which ignition occurs outside the chamber (cylinder or turbine) in which heat is converted to mechanical energyverifiedMay 18, 2026
Externalisationnounattributing to outside causesverifiedMay 18, 2026
Externalitynounthe quality or state of being outside or directed toward or relating to the outside or exteriorverifiedMay 18, 2026
Externalizationnounattributing to outside causesverifiedMay 18, 2026
Exteroceptionnounsensitivity to stimuli originating outside of the bodyverifiedMay 18, 2026
Exteroceptornounany receptor that responds to stimuli outside the bodyverifiedMay 18, 2026
Extinctionnouna conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulusverifiedMay 18, 2026
Extinction AnglenounMWEthe angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized lightverifiedMay 18, 2026
Extinguishernouna manually operated device for extinguishing small firesverifiedMay 18, 2026
Extinguishingnounthe act of extinguishingverifiedMay 18, 2026
Extirpationnounsurgical removal of a body part or tissueverifiedMay 18, 2026
Extollernounsomeone who communicates high praiseverifiedMay 18, 2026
Extolmentnounan expression of approval and commendationverifiedMay 18, 2026
Extortionnounthe felonious act of extorting money (as by threats of violence)verifiedMay 18, 2026
Extortionernouna criminal who extorts money from someone by threatening to expose embarrassing information about themverifiedMay 18, 2026
Extortionistnouna criminal who extorts money from someone by threatening to expose embarrassing information about themverifiedMay 18, 2026
Extra DividendnounMWEa dividend paid in addition to the regular dividendverifiedMay 18, 2026
Extra InningsnounMWEovertime play until one team is ahead at the end of an inningverifiedMay 18, 2026
Extra LargenounMWEa garment size for a very large personverifiedMay 18, 2026
Extra PointnounMWEin American football a point awarded for a successful place kick following a touchdownverifiedMay 18, 2026
Extra TimenounMWEplaying time beyond regulation, to break a tieverifiedMay 18, 2026
Extracapsular SurgerynounMWEcataract surgery in which only the front of the lens is removedverifiedMay 18, 2026
Extracellular FluidnounMWEliquid containing proteins and electrolytes including the liquid in blood plasma and interstitial fluidverifiedMay 18, 2026
Extractionnounthe process of obtaining something from a mixture or compound by chemical or physical or mechanical meansverifiedMay 18, 2026
Extraction ResistancenounMWECapability of crypto-equipment or secure telecommunications equipment to resist efforts to extract key.ControlRegulatedMay 9, 2026
Extractornouna mechanism in a firearm that pulls an empty shell case out of the chamber and passes it to the ejectorverifiedMay 18, 2026
Extracurricular ActivitynounMWEeducational activities not falling within the scope of the regular curriculumverifiedMay 18, 2026
Extraditionnounthe surrender of an accused or convicted person by one state or country to another (usually under the provisions of a statute or treaty)verifiedMay 18, 2026
Extradosnounthe exterior curve of an archverifiedMay 18, 2026
Extragalactic NebulanounMWE(astronomy) a collection of star systemsverifiedMay 18, 2026
Extramarital SexnounMWEsexual intercourse between individuals who are not married to one anotherverifiedMay 18, 2026
Extraneousnessnoununrelatedness by virtue of falling outside the matter at handverifiedMay 18, 2026
ExtranetnounA private network that uses Web technology, permitting the sharing of portions of an enterprise’s information or operations with suppliers, vendors, partners, customers, or other enterprises.NetworkMay 12, 2026
Extraordinarinessnounthe quality of being extraordinary and not commonly encounteredverifiedMay 18, 2026
Extrapolationnounan inference about the future (or about some hypothetical situation) based on known facts and observationsverifiedMay 18, 2026
Extrasensory PerceptionnounMWEapparent power to perceive things that are not present to the sensesverifiedMay 18, 2026
Extrasystolenouna premature systole resulting in a momentary cardiac arrhythmiaverifiedMay 18, 2026
Extrauterine GestationnounMWEpregnancy resulting from gestation elsewhere than in the uterusverifiedMay 18, 2026
Extrauterine PregnancynounMWEpregnancy resulting from gestation elsewhere than in the uterusverifiedMay 18, 2026
Extravagancenounthe quality of exceeding the appropriate limits of decorum or probability or truthverifiedMay 18, 2026
Extravagancynounthe quality of exceeding the appropriate limits of decorum or probability or truthverifiedMay 18, 2026
Extravaganzanounany lavishly staged or spectacular entertainmentverifiedMay 18, 2026
Extravasationnounthe process of exuding or passing out of a vessel into surrounding tissuesverifiedMay 18, 2026
Extraversionnoun(psychology) an extroverted dispositionverifiedMay 18, 2026
Extreme PointnounMWEthe point located farthest from the middle of somethingverifiedMay 18, 2026
Extreme Right-WingernounMWEan extreme conservativeverifiedMay 18, 2026
Extreme UnctionnounMWEa Catholic sacramentverifiedMay 18, 2026
Extremely High FrequencynounMWE30 to 300 gigahertzverifiedMay 18, 2026
Extremely Low FrequencynounMWEbelow 3 kilohertzverifiedMay 18, 2026
Extremenessnounthe quality of being extremeverifiedMay 18, 2026
Extremismnounany political theory favoring immoderate uncompromising policiesverifiedMay 18, 2026
Extremitynounan extreme condition or state (especially of adversity or disease)verifiedMay 18, 2026
Extremumnounthe point located farthest from the middle of somethingverifiedMay 18, 2026
Extricationnounthe act of releasing from a snarled or tangled conditionverifiedMay 18, 2026
Extrinsic FraudnounMWEfraud that prevents a party from knowing their rights or from having a fair opportunity of presenting them at trialverifiedMay 18, 2026
Extropynounthe prediction that human intelligence and technology will enable life to expand in an orderly way throughout the entire universeverifiedMay 18, 2026
Extroversionnoun(psychology) an extroverted dispositionverifiedMay 18, 2026
Extrusionnounsomething that bulges out or is protuberant or projects from its surroundingsverifiedMay 18, 2026
Exuberancenounoverflowing with eager enjoyment or approvalverifiedMay 18, 2026
Exudationnouna substance that oozes out from plant poresverifiedMay 18, 2026
Exultationnounthe utterance of sounds expressing great joyverifiedMay 18, 2026
Exurbianouna residential area outside of a city and beyond suburbiaverifiedMay 18, 2026
Exuviaenouncast-off skins or coverings of various organisms during ecdysisverifiedMay 18, 2026
Eyasnounan unfledged or nestling hawkverifiedMay 18, 2026
Eye BanknounMWEa place for storing and preserving corneas that are obtained from human corpses immediately after deathverifiedMay 18, 2026
Eye BlinknounMWEa reflex that closes and opens the eyes rapidlyverifiedMay 18, 2026
Eye CandynounMWEvisual images that are pleasing to see but are intellectually undemandingverifiedMay 18, 2026
Eye ChartnounMWEa chart that is read from a fixed distanceverifiedMay 18, 2026
Eye ClinicnounMWEa clinic where specialist care for a patient's eyesverifiedMay 18, 2026
Eye ConditionnounMWEthe condition of the optical properties of the eyeverifiedMay 18, 2026
Eye ContactnounMWEa meeting of the eyes between two people that expresses meaningful nonverbal communicationverifiedMay 18, 2026
Eye DialectnounMWEthe use of misspellings to identify a colloquial or uneducated speakerverifiedMay 18, 2026
Eye DiseasenounMWEany disease of the eyeverifiedMay 18, 2026
Eye DoctornounMWEa medical doctor specializing in the diagnosis and treatment of diseases of the eyeverifiedMay 18, 2026
Eye DroppernounMWEpipet consisting of a small tube with a vacuum bulb at one end for drawing liquid in and releasing it a drop at a timeverifiedMay 18, 2026
Eye InfectionnounMWEan infection of the sebaceous gland of the eyelidverifiedMay 18, 2026
Eye MasknounMWEa mask covering the upper part of the face but with holes for the eyesverifiedMay 18, 2026
Eye MovementnounMWEthe movement of the eyesverifiedMay 18, 2026
Eye MusclenounMWEone of the small muscles of the eye that serve to rotate the eyeballverifiedMay 18, 2026