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Glossary · Nouns · A

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TermTypeDefinitionClassificationsUpdated
Anti-jamnounCountermeasures ensuring that transmitted information can be received despite deliberate jamming attempts.ControlRegulatedCUIMay 9, 2026
Anti-malwarenounA technology widely used to prevent, detect and remove many categories of malware, including computer viruses, worms, Trojans, keyloggers, malicious browser plug-ins, adware and spywareThreatMay 9, 2026
Anti-Racketeering LawnounMWElaw intended to eradicate organized crime by establishing strong sanctions and forfeiture provisionsverifiedMay 18, 2026
Anti-Semitismnounthe intense dislike for and prejudice against Jewish peopleverifiedMay 18, 2026
Anti-spoofnounCountermeasures taken to prevent the unauthorized use of legitimate Identification & Authentication (I&A) data, however it was obtained, to mimic a subject different from the attacker.ControlMay 9, 2026
Anti-Submarine RocketnounMWEa shipboard system to fire rockets at submarinesverifiedMay 18, 2026
Anti-Sway BarnounMWEa rigid metal bar between the front suspensions and between the rear suspensions of cars and trucksverifiedMay 18, 2026
Anti-Takeover DefensenounMWEresistance to or defense against a hostile takeoververifiedMay 18, 2026
Anti-Tnf CompoundnounMWEa class of drugs that block the action of tumor necrosis factor (TNF)verifiedMay 18, 2026
Anti-Torque RotornounMWErotor consisting of a rotating airfoil on the tail of a single-rotor helicopterverifiedMay 18, 2026
Anti-Virus ProgramnounMWEa computer program that checks a computer for viruses and prevents their spreadverifiedMay 18, 2026
Anti-War MovementnounMWEa campaign against entering or continuing a warverifiedMay 18, 2026
Antiacidnounan agent that counteracts or neutralizes acidity, especially in the stomachverifiedMay 18, 2026
Antiaircraft FirenounMWEfiring at enemy aircraftverifiedMay 18, 2026
Antiaircraft GunnounMWEartillery designed to shoot upward at airplanesverifiedMay 18, 2026
Antialiasingnoun(computer graphics) a technique that is used to smooth jagged distortions in curves and diagonal lines so they appear smootherverifiedMay 18, 2026
Antianxiety AgentnounMWEa drug used to reduce stress or tension without reducing mental clarityverifiedMay 18, 2026
Antianxiety DrugnounMWEa tranquilizer used to relieve anxiety and reduce tension and irritabilityverifiedMay 18, 2026
Antiarrhythmicnouna drug used to treat an abnormal heart rhythmverifiedMay 18, 2026
Antiarrhythmic DrugnounMWEa drug used to treat an abnormal heart rhythmverifiedMay 18, 2026
Antiarrhythmic MedicationnounMWEa drug used to treat an abnormal heart rhythmverifiedMay 18, 2026
Antibacterial DrugnounMWEany drug that destroys bacteria or inhibits their growthverifiedMay 18, 2026
Antiballistic MissilenounMWEa defensive missile designed to shoot down incoming intercontinental ballistic missilesverifiedMay 18, 2026
Antibaryonnounthe antiparticle of a baryonverifiedMay 18, 2026
Antiberiberi FactornounMWEa B vitamin that prevents beriberiverifiedMay 18, 2026
Antibiosisnounan association between organisms that is harmful to one of them or between organisms and a metabolic product of anotherverifiedMay 18, 2026
Antibiotic DrugnounMWEa chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infectionsverifiedMay 18, 2026
Antibodynounany of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune responseverifiedMay 18, 2026
Anticatalystnoun(chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalystverifiedMay 18, 2026
Anticholinergic DrugnounMWEa substance that opposes or blocks the action of acetylcholineverifiedMay 18, 2026
Anticholinesterasenouna medicine that inhibits cholinesterase by combining with it and so has a cholinergic effectverifiedMay 18, 2026
Anticipationnounthe act of predicting (as by reasoning about the future)verifiedMay 18, 2026
Anticipatornounone who anticipatesverifiedMay 18, 2026
Anticipatory BreachnounMWEverifiedMay 15, 2026
Anticlimaxnouna change from a serious subject to a disappointing oneverifiedMay 18, 2026
Anticoagulantnounmedicine that prevents or retards the clotting of bloodverifiedMay 18, 2026
Anticoagulant MedicationnounMWEmedicine that prevents or retards the clotting of bloodverifiedMay 18, 2026
Anticoagulationnounthe administration of an anticoagulant drug to retard coagulation of the bloodverifiedMay 18, 2026
Anticonvulsantnouna drug used to treat or prevent convulsions (as in epilepsy)verifiedMay 18, 2026
Anticonvulsant DrugnounMWEa drug used to treat or prevent convulsions (as in epilepsy)verifiedMay 18, 2026
Anticyclonenoun(meteorology) winds spiraling outward from a high pressure centerverifiedMay 18, 2026
Antidepressantnounany of a class of drugs used to treat depressionverifiedMay 18, 2026
Antidepressant DrugnounMWEany of a class of drugs used to treat depressionverifiedMay 18, 2026
Antidiabeticnouna drug used to treat diabetes mellitusverifiedMay 18, 2026
Antidiabetic DrugnounMWEa drug used to treat diabetes mellitusverifiedMay 18, 2026
Antidiarrhealnouna drug used to control or stop diarrheaverifiedMay 18, 2026
Antidiarrheal DrugnounMWEa drug used to control or stop diarrheaverifiedMay 18, 2026
Antidisestablishmentarianismnounopposition to the disestablishment of the Church of England; most often used as an example of a very long wordverifiedMay 18, 2026
Antidiureticnouna drug that limits the formation of urineverifiedMay 18, 2026
Antidiuretic DrugnounMWEa drug that limits the formation of urineverifiedMay 18, 2026
Antidiuretic HormonenounMWEhormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamusverifiedMay 18, 2026
Antidotenouna remedy that stops or controls the effects of a poisonverifiedMay 18, 2026
Antielectronnounan elementary particle with positive chargeverifiedMay 18, 2026
Antiemeticnouna drug that prevents or alleviates nausea and vomitingverifiedMay 18, 2026
Antiemetic DrugnounMWEa drug that prevents or alleviates nausea and vomitingverifiedMay 18, 2026
Antiepilepticnouna drug used to treat or prevent convulsions (as in epilepsy)verifiedMay 18, 2026
Antiepileptic DrugnounMWEa drug used to treat or prevent convulsions (as in epilepsy)verifiedMay 18, 2026
Antiestablishmentarianismnounthe doctrine of opposition to the social and political establishmentverifiedMay 18, 2026
Antiestablishmentismnounthe doctrine of opposition to the social and political establishmentverifiedMay 18, 2026
Antifeminismnounactivity indicative of belief in the superiority of men over womenverifiedMay 18, 2026
Antifeministnounsomeone who does not believe in the social or economic or political equality of men and womenverifiedMay 18, 2026
Antiferromagnetismnounmagnetic field creates parallel but opposing spinsverifiedMay 18, 2026
Antiflatulentnounany agent that reduces intestinal gasverifiedMay 18, 2026
Antifouling PaintnounMWEa paint used to protect against the accumulation of barnacles etc. on underwater surfacesverifiedMay 18, 2026
Antifreezenouna liquid added to the water in a cooling system to lower its freezing pointverifiedMay 18, 2026
Antifungal AgentnounMWEany agent that destroys or prevents the growth of fungiverifiedMay 18, 2026
Antigennounany substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies)verifiedMay 18, 2026
Antigenic DeterminantnounMWEthe site on the surface of an antigen molecule to which an antibody attaches itselfverifiedMay 18, 2026
Antigramnounan anagram that means the opposite of the original word or phraseverifiedMay 18, 2026
Antihemophilic FactornounMWEa coagulation factor (trade name Hemofil) whose absence is associated with hemophilia AverifiedMay 18, 2026
Antihemorrhagic FactornounMWEa fat-soluble vitamin that helps in the clotting of bloodverifiedMay 18, 2026
Antiheronouna protagonist who lacks the characteristics that would make him a hero (or her a heroine)verifiedMay 18, 2026
Antihistaminenouna medicine used to treat allergies and hypersensitive reactions and coldsverifiedMay 18, 2026
Antihypertensivenouna drug that reduces high blood pressureverifiedMay 18, 2026
Antihypertensive DrugnounMWEa drug that reduces high blood pressureverifiedMay 18, 2026
Antileptonnounthe antiparticle of a leptonverifiedMay 18, 2026
Antilognounthe number of which a given number is the logarithmverifiedMay 18, 2026
Antilogarithmnounthe number of which a given number is the logarithmverifiedMay 18, 2026
Antimacassarnouna piece of ornamented cloth that protects the back of a chair from hair oilsverifiedMay 18, 2026
Antimalarialnouna medicinal drug used to prevent or treat malariaverifiedMay 18, 2026
Antimalarial DrugnounMWEa medicinal drug used to prevent or treat malariaverifiedMay 18, 2026
antimalware softwarenounMWEA program that monitors a computer or network to identify all major types of malware: virus, trojan horse, spyware, Adware, worms, rootkits, etc.CapabilityMay 9, 2026
Antimatternounmatter consisting of elementary particles that are the antiparticles of those making up normal substancesverifiedMay 18, 2026
Antimesonnounthe antiparticle of a mesonverifiedMay 18, 2026
Antimetabolitenounan antineoplastic drug that inhibits the utilization of a metaboliteverifiedMay 18, 2026
Antimonial LeadnounMWEa lead alloy that contains about 5% antimonyverifiedMay 18, 2026
Antimonynouna metallic element having four allotropic formsverifiedMay 18, 2026
Antimuonnounthe antiparticle of a muonverifiedMay 18, 2026
Antimycinnouna crystalline antibiotic active against various fungiverifiedMay 18, 2026
Antimycoticnounany agent that destroys or prevents the growth of fungiverifiedMay 18, 2026
Antimycotic AgentnounMWEany agent that destroys or prevents the growth of fungiverifiedMay 18, 2026
Antineoplastic AntibioticnounMWEan antibiotic drug used as an antineoplastic in chemotherapyverifiedMay 18, 2026
Antineoplastic DrugnounMWEany of several drugs that control or kill neoplastic cellsverifiedMay 18, 2026
Antineutrinonounthe antiparticle of a neutrinoverifiedMay 18, 2026
Antineutronnounthe antiparticle of a neutronverifiedMay 18, 2026
Antinodenoun(physics) the point of maximum displacement in a periodic systemverifiedMay 18, 2026
Antinomasianounsubstitution of a title for a nameverifiedMay 18, 2026
Antinomianismnounthe theological doctrine that by faith and God's grace a Christian is freed from all laws (including the moral standards of the culture)verifiedMay 18, 2026
Antinomynouna contradiction between two statements that seem equally reasonableverifiedMay 18, 2026
Antiophthalmic FactornounMWEany of several fat-soluble vitamins essential for normal visionverifiedMay 18, 2026