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Glossary · Nouns · I

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TermTypeDefinitionClassificationsUpdated
Infantile FixationnounMWEan abnormal state in which development has stopped prematurelyverifiedMay 18, 2026
Infantile ParalysisnounMWEan acute viral disease marked by inflammation of nerve cells of the brain stem and spinal cordverifiedMay 18, 2026
Infantilismnounan abnormal condition in which an older child or adult retains infantile characteristicsverifiedMay 18, 2026
Infantrynounan army unit consisting of soldiers who fight on footverifiedMay 18, 2026
Infantrymannounfights on foot with small armsverifiedMay 18, 2026
Infarctnounlocalized necrosis resulting from obstruction of the blood supplyverifiedMay 18, 2026
Infarctionnounlocalized necrosis resulting from obstruction of the blood supplyverifiedMay 18, 2026
Infatuationnouna foolish and usually extravagant passion or love or admirationverifiedMay 18, 2026
Infeasibilitynounthe quality of not being doableverifiedMay 18, 2026
Infectionnoun(medicine) the invasion of the body by pathogenic microorganisms and their multiplication which can lead to tissue damage and diseaseverifiedMay 18, 2026
Infectious AgentnounMWEan agent capable of producing infectionverifiedMay 18, 2026
Infectious DiseasenounMWEa disease transmitted only by a specific kind of contactverifiedMay 18, 2026
Infectious HepatitisnounMWEan acute but benign form of viral hepatitis caused by an RNA virus that does not persist in the blood serum and is usually transmitted by ingesting food or drink that is contaminated with fecal matterverifiedMay 18, 2026
Infectious MononucleosisnounMWEan acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstreamverifiedMay 18, 2026
Infectious PolyneuritisnounMWEa form of peripheral polyneuritis characterized by pain and weakness and sometimes paralysis of the limbsverifiedMay 18, 2026
Infective AgentnounMWEan agent capable of producing infectionverifiedMay 18, 2026
Infelicitynouninappropriate and unpleasing manner or style (especially manner or style of expression)verifiedMay 18, 2026
Inferencenounthe reasoning involved in drawing a conclusion or making a logical judgment on the basis of circumstantial evidence and prior conclusions rather than on the basis of direct observationProcessMay 18, 2026
Inference AttacknounMWEInference Attacks rely on the user to make logical connections between seemingly unrelated pieces of information.ThreatMay 9, 2026
Inferior Alveolar ArterynounMWEthe alveolar artery that goes through the mandibular canal to supply the lower teethverifiedMay 18, 2026
Inferior Cerebellar ArterynounMWEthe inferior branch of the cerebellar arteryverifiedMay 18, 2026
Inferior Cerebral VeinnounMWEveins that drain the undersurface of the cerebral hemispheres and empty into the cavernous and transverse sinusesverifiedMay 18, 2026
Inferior ColliculusnounMWEan essential auditory center in the midbrainverifiedMay 18, 2026
Inferior ConjunctionnounMWE(astronomy) the alignment of the Earth and a planet on the same side of the sunverifiedMay 18, 2026
Inferior CourtnounMWEany court whose decisions can be appealed to a higher courtverifiedMay 18, 2026
Inferior Epigastric VeinnounMWEempties into the external iliac veinverifiedMay 18, 2026
Inferior Labial ArterynounMWEan artery that is a branch of the facial artery that supplies the lower lipverifiedMay 18, 2026
Inferior Labial VeinnounMWEa tributary of the facial vein that drains the lower lipverifiedMay 18, 2026
Inferior Mesenteric ArterynounMWEarises near the lower end of the aorta and supplies the large intestineverifiedMay 18, 2026
Inferior Ophthalmic VeinnounMWEa vein that drains a venous network in the floor and medial wall of the eye socketverifiedMay 18, 2026
Inferior PlanetnounMWEany of the planets whose orbit lies inside the earth's orbitverifiedMay 18, 2026
Inferior Pulmonary VeinnounMWEeither of two pulmonary veins (left and right) returning blood from the inferior lobes of the lungsverifiedMay 18, 2026
Inferior RectusnounMWEthe ocular muscle whose contraction turns the eyeball down and mediallyverifiedMay 18, 2026
Inferior Rectus MusclenounMWEthe ocular muscle whose contraction turns the eyeball down and mediallyverifiedMay 18, 2026
Inferior Thalamostriate VeinnounMWEtributaries to the basal veinverifiedMay 18, 2026
Inferior Thyroid VeinnounMWEany of several veins on each side that drain the thyroid gland and empty into the innominate veinverifiedMay 18, 2026
Inferior Vena CavanounMWEreceives blood from lower limbs and abdominal organs and empties into the posterior part of the right atrium of the heartverifiedMay 18, 2026
Inferior Vocal CordnounMWEeither of the two lower vocal folds that come together to form the glottisverifiedMay 18, 2026
Inferior Vocal FoldnounMWEeither of the two lower vocal folds that come together to form the glottisverifiedMay 18, 2026
Inferiority ComplexnounMWEa sense of personal inferiority arising from conflict between the desire to be noticed and the fear of being humiliatedverifiedMay 18, 2026
Infernal MachinenounMWEa bomb that has a detonating mechanism that can be set to go off at a particular timeverifiedMay 18, 2026
Infernal RegionnounMWE(Christianity) the abode of Satan and the forces of evilverifiedMay 18, 2026
Infernonouna very intense and uncontrolled fireverifiedMay 18, 2026
Infertilitynounthe state of being unable to produce offspringverifiedMay 18, 2026
Infestationnounthe state of being invaded or overrun by parasitesverifiedMay 18, 2026
Infidelnouna person who does not acknowledge your godverifiedMay 18, 2026
Infidelitynounthe quality of being unfaithfulverifiedMay 18, 2026
Infieldnounthe area of a baseball field that is enclosed by 3 bases and home plateverifiedMay 18, 2026
Infieldernoun(baseball) a person who plays a position in the infieldverifiedMay 18, 2026
Infiltrationnouna process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)verifiedMay 18, 2026
Infiltratornounsomeone who takes up a position surreptitiously for the purpose of espionageverifiedMay 18, 2026
Infinitenessnounthe quality of being infiniteverifiedMay 18, 2026
Infinitesimal CalculusnounMWEthe branch of mathematics that is concerned with limits and with the differentiation and integration of functionsverifiedMay 18, 2026
Infinitivenounthe uninflected form of the verbverifiedMay 18, 2026
Infinitudenounthe quality of being infiniteverifiedMay 18, 2026
Infinitynountime without endverifiedMay 18, 2026
Infirmarynouna health facility where patients receive treatmentverifiedMay 18, 2026
Infirmitynounthe state of being weak in health or body (especially from old age)verifiedMay 18, 2026
Infix NotationnounMWEa notation for forming mathematical expressions using parentheses and governed by rules of operator precedenceverifiedMay 18, 2026
Inflamingnounarousal to violent emotionverifiedMay 18, 2026
Inflammabilitynounthe quality of being easily ignited and burning rapidlyverifiedMay 18, 2026
Inflammationnounthe state of being emotionally aroused and worked upverifiedMay 18, 2026
Inflammatory Bowel DiseasenounMWEinflammation of the colonverifiedMay 18, 2026
Inflammatory DiseasenounMWEa disease characterized by inflammationverifiedMay 18, 2026
Inflatable CushionnounMWEa cushion usually made of rubber or plastic that can be inflatedverifiedMay 18, 2026
Inflaternounan air pump operated by hand to inflate something (as a tire)verifiedMay 18, 2026
Inflationnoun(cosmology) a brief exponential expansion of the universe (faster than the speed of light) postulated to have occurred shortly after the big bangverifiedMay 18, 2026
Inflation RatenounMWEthe rate of change of prices (as indicated by a price index) calculated on a monthly or annual basisverifiedMay 18, 2026
Inflation TherapynounMWEtherapy in which water or oxygen or a drug is introduced into the respiratory tract with inhaled airverifiedMay 18, 2026
Inflationary SpiralnounMWEan episode of inflation in which prices and wages increase at an increasing rate and currency rapidly loses valueverifiedMay 18, 2026
Inflatornounan air pump operated by hand to inflate something (as a tire)verifiedMay 18, 2026
Inflectionnouna change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical functionverifiedMay 18, 2026
Inflectional EndingnounMWEan inflection that is added at the end of a root wordverifiedMay 18, 2026
Inflectional MorphologynounMWEthe part of grammar that deals with the inflections of wordsverifiedMay 18, 2026
Inflectional SuffixnounMWEan inflection that is added at the end of a root wordverifiedMay 18, 2026
Inflexibilitynounthe quality of being rigid and rigorously severeverifiedMay 18, 2026
Inflexiblenessnouna lack of physical flexibilityverifiedMay 18, 2026
Inflexionnouna change in the form of a word (usually by adding a suffix) to indicate a change in its grammatical functionverifiedMay 18, 2026
Inflictionnounthe act of imposing something (as a tax or an embargo)verifiedMay 18, 2026
Infliximabnouna monoclonal antibody (trade name Remicade) used to treat Crohn's disease and rheumatoid arthritisverifiedMay 18, 2026
Inflorescencenounthe flowering part of a plant or arrangement of flowers on a stalkverifiedMay 18, 2026
Inflownounthe process of flowing inverifiedMay 18, 2026
Influential PersonnounMWEa person whose actions and opinions strongly influence the course of eventsverifiedMay 18, 2026
Influenzanounan acute febrile highly contagious viral diseaseverifiedMay 18, 2026
Influxnounthe process of flowing inverifiedMay 18, 2026
Infonouna message received and understoodverifiedMay 18, 2026
Infoldingnounthe folding in of an outer layer so as to form a pocket in the surfaceverifiedMay 18, 2026
Infomercialnouna television commercial presented in the form of a short documentaryverifiedMay 18, 2026
informnounGive someone facts or information.ProcessMay 12, 2026
Informal Security PolicynounMWENatural language description, possibly supplemented by mathematical arguments, demonstrating the correspondence of the functional specification to the high-level design.RequirementMay 9, 2026
Informalitynouna manner that does not take forms and ceremonies seriouslyverifiedMay 18, 2026
Informantnounsomeone who sees an event and reports what happenedverifiedMay 18, 2026
Informaticsnounthe sciences concerned with gathering, manipulating, storing, retrieving, and classifying recorded informationverifiedMay 18, 2026
informationnounAny communication or representation of knowledge such as facts, data, or opinions in any medium or form, including textual, numerical, graphic, cartographic, narrative, or audiovisual.DataMay 9, 2026
Information AgenounMWEa period beginning in the last quarter of the 20th century when information became easily accessible through publications and through the manipulation of information by computers and computer networksverifiedMay 18, 2026
information and communication(s) technologynounMWEAny information technology, equipment, or interconnected system or subsystem of equipment that processes, transmits, receives, or interchanges data or information.SystemRegulatedMay 12, 2026
information assetnounMWEAny piece of data, device or other component of the environment that supports information-related activities. In the context of this report, information assets include data, hardware and software.25 Information assets are not limited to those that are owned by the entity. They also include those that are rented or leased, and those that are used by service providers to deliver their services.DataMay 9, 2026
information assurancenounMWEMeasures that protect and defend information and information systems by ensuring their availability, integrity, authentication, confidentiality, and non-repudiation. These measures include providing for restoration of information systems by incorporating protection, detection, and reaction capabilities.CapabilityMay 9, 2026
Information Assurance CompliancnounMWEIn the NICE Workforce Framework, cybersecurity work where a person: Oversees, evaluates, and supports the documentation, validation, and accreditation processes necessary to assure that new IT systems meet the organization's information assurance and security requirements; ensures appropriate treatment of risk, compliance, and assurance from internal and external perspectives.CapabilityRegulatedMay 9, 2026
Information Assurance ComponentnounMWEAn application (hardware and/or software) that provides one or more Information Assurance capabilities in support of the overall security and operational objectives of a system.CapabilityRegulatedCUIMay 12, 2026