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Glossary · Nouns · A

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TermTypeDefinitionClassificationsUpdated
Aldehyde GroupnounMWEthe chemical group -CHOverifiedMay 18, 2026
Aldehyde RadicalnounMWEthe chemical group -CHOverifiedMay 18, 2026
Aldehyde-Alcoholnounan oily colorless liquid obtained by the condensation of two molecules of acetaldehydeverifiedMay 18, 2026
Aldernounnorth temperate shrubs or trees having toothed leaves and conelike fruitverifiedMay 18, 2026
Alder BlightnounMWEa disease of alders caused by the woolly alder aphid (a plant louse)verifiedMay 18, 2026
Alder BuckthornnounMWEsmall tree common in EuropeverifiedMay 18, 2026
Alder TreenounMWEnorth temperate shrubs or trees having toothed leaves and conelike fruitverifiedMay 18, 2026
Alder-Leaved ServiceberrynounMWEshrub or small tree of northwestern North America having fragrant creamy white flowers and small waxy purple-red fruitsverifiedMay 18, 2026
Alderflynoundark-colored insect having predaceous aquatic larvaeverifiedMay 18, 2026
Aldermannouna member of a municipal legislative body (as a city council)verifiedMay 18, 2026
Aldohexosenouna monosaccharide sugar having six carbon atoms and an aldehyde groupverifiedMay 18, 2026
Aldolnounan oily colorless liquid obtained by the condensation of two molecules of acetaldehydeverifiedMay 18, 2026
Aldol ReactionnounMWEa reaction of aldehydes resulting in an aldolverifiedMay 18, 2026
Aldosenouna monosaccharide sugar that contains the aldehyde group or is hemiacetalverifiedMay 18, 2026
Aldosteronenouna corticosteroid hormone that is secreted by the cortex of the adrenal glandverifiedMay 18, 2026
Aldosteronismnouna condition caused by overproduction of aldosteroneverifiedMay 18, 2026
Alenouna general name for beer made with a top fermenting yeastverifiedMay 18, 2026
Ale DrinkernounMWEsomeone whose favorite drink is beer or aleverifiedMay 18, 2026
Aleatory ContractnounMWEa contract whose performance by one party depends on the occurrence of an uncertain contingent event (but if it is contingent on the outcome of a wager it is not enforceable)verifiedMay 18, 2026
Alecostnountansy-scented Eurasian perennial herb with buttonlike yellow flowersverifiedMay 18, 2026
Alehoofnountrailing European aromatic plant of the mint family having rounded leaves and small purplish flowers often grown in hanging basketsverifiedMay 18, 2026
Alehousenouna tavern where ale is soldverifiedMay 18, 2026
Alembicnounan obsolete kind of container used for distillationverifiedMay 18, 2026
Alendronatenouna tablet (trade name Fosamax) prescribed to prevent or treat osteoporosis in women after menopauseverifiedMay 18, 2026
Alephnounthe 1st letter of the Hebrew alphabetverifiedMay 18, 2026
Aleph-Noughtnounthe smallest infinite integerverifiedMay 18, 2026
Aleph-Nullnounthe smallest infinite integerverifiedMay 18, 2026
Aleph-Zeronounthe smallest infinite integerverifiedMay 18, 2026
alert parameternounMWEA parameter that is used to determine when an alert is triggered.EventMay 9, 2026
Alert situationnounMWEThe point in an emergency procedure when the elapsed time passes a threshold and the interruption is not resolved. The enterprise entering into an alert situation initiates a series of escalation steps.EventMay 9, 2026
Alertingnouna warning serves to make you more alert to dangerverifiedMay 18, 2026
Alertnessnounthe process of paying close and continuous attentionverifiedMay 18, 2026
Alethic LogicnounMWEthe modal logic of necessity and possibility and contingencyverifiedMay 18, 2026
Aleuronenoungranular protein in outermost layer of endosperm of many seeds or cereal grainsverifiedMay 18, 2026
Alewifenounflesh of shad-like fish abundant along the Atlantic coast or in coastal streamsverifiedMay 18, 2026
Alexandritenouna green variety of chrysoberyl used as a gemstoneverifiedMay 18, 2026
Alexianouninability to perceive written wordsverifiedMay 18, 2026
Alfalfanounimportant European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay cropverifiedMay 18, 2026
Alfalfa SproutnounMWEsprouted alfalfa seedsverifiedMay 18, 2026
AlfilarianounEuropean weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight upverifiedMay 18, 2026
AlfilerianounEuropean weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight upverifiedMay 18, 2026
Alganounprimitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leavesverifiedMay 18, 2026
Algarobillanounmesquite pod used in tanning and dyeingverifiedMay 18, 2026
Algarrobanounmesquite of Gulf Coast and Caribbean Islands from Mexico to VenezuelaverifiedMay 18, 2026
Algarroba BeannounMWElong pod containing small beans and sweetish edible pulpverifiedMay 18, 2026
Algarrobillanounmesquite pod used in tanning and dyeingverifiedMay 18, 2026
Algebranounthe mathematics of generalized arithmetical operationsverifiedMay 18, 2026
Algebraic LanguagenounMWEan algorithmic language having statements that resemble algebraic expressionsverifiedMay 18, 2026
Algebraic NumbernounMWEroot of an algebraic equation with rational coefficientsverifiedMay 18, 2026
Algebraistnouna mathematician whose specialty is algebraverifiedMay 18, 2026
Algiditynounprostration characterized by cold and clammy skin and low blood pressureverifiedMay 18, 2026
Alginnouna gum used especially as a thickener or emulsifierverifiedMay 18, 2026
Alginic AcidnounMWEa gum used especially as a thickener or emulsifierverifiedMay 18, 2026
Algolagnianounsexual pleasure derived from inflicting or experiencing painverifiedMay 18, 2026
Algologynounthe branch of botany that studies algaeverifiedMay 18, 2026
Algometernoundevice for measuring pain caused by pressureverifiedMay 18, 2026
Algometrynounmeasuring sensitivity to pain or pressureverifiedMay 18, 2026
Algophilianounsexual pleasure derived from inflicting or experiencing painverifiedMay 18, 2026
Algophobianouna morbid fear of painverifiedMay 18, 2026
Algorismnounthe Arabic (or decimal) system of numerationverifiedMay 18, 2026
AlgorithmnounA finite set of step-by-step instructions for a problem-solving or computation procedure, especially one that can be implemented by a computer.ProcessMay 9, 2026
Algorithm ErrornounMWEerror resulting from the choice of the wrong algorithm or method for achieving the intended resultverifiedMay 18, 2026
Algorithmic AversionnounMWEbiased assessment of an algorithm which manifests in negative behaviours and attitudes towards the algorithm compared to a human agent.ThreatMay 18, 2026
Algorithmic LanguagenounMWEan artificial language designed to express algorithmsverifiedMay 18, 2026
Algorithmic ProgramnounMWEa precise rule (or set of rules) specifying how to solve some problemverifiedMay 18, 2026
Algorithmic RulenounMWEa precise rule (or set of rules) specifying how to solve some problemverifiedMay 18, 2026
Aliasnouna name that has been assumed temporarilyverifiedMay 18, 2026
Alicyclic CompoundnounMWEan aliphatic compound that contains a ring of atomsverifiedMay 18, 2026
Alidadnounsurveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachmentsverifiedMay 18, 2026
Alidadenounsurveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachmentsverifiedMay 18, 2026
Alien AbscondernounMWEa fugitive remaining in the United States after an immigration judge has ordered them deportedverifiedMay 18, 2026
Alienagenounthe quality of being alienverifiedMay 18, 2026
Alienationnoun(law) the voluntary and absolute transfer of title and possession of real property from one person to anotherverifiedMay 18, 2026
Alienation of AffectionnounMWEa tort based on willful and malicious interference with the marriage relation by a third party without justification or excuseverifiedMay 18, 2026
Alienatornounan unpleasant person who causes friendly people to become indifferent or unfriendly or hostileverifiedMay 18, 2026
Alieneenounsomeone to whom the title of property is transferredverifiedMay 18, 2026
Alienismnounan obsolete term for the study and treatment of mental illnessverifiedMay 18, 2026
Alienistnouna psychiatrist and specialist in the legal aspects of mental illnessverifiedMay 18, 2026
Alienornounsomeone from whom the title of property is transferredverifiedMay 18, 2026
Alignmentnounensur[ing] that powerful AI is properly aligned with human values. ... The challenge of alignment has two parts. The first part is technical and focuses on how to formally encode values or principles in artificial agents so that they reliably do what they ought to do. ... The second part of the value alignment question is normative. It asks what values or principles, if any, we ought to encode in artificial agents.RequirementMay 18, 2026
Alikenessnounsimilarity in appearance or character or nature between persons or thingsverifiedMay 18, 2026
Alimentary CanalnounMWEtubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anusverifiedMay 18, 2026
Alimentary PastenounMWEshaped and dried dough made from flour and water and sometimes eggverifiedMay 18, 2026
Alimentary TractnounMWEtubular passage of mucous membrane and muscle extending about 8.3 meters from mouth to anusverifiedMay 18, 2026
Alimentary Tract SmearnounMWEany of several cytologic smears obtained from different parts of the alimentary tractverifiedMay 18, 2026
Alimentationnounthe act of supplying food and nourishmentverifiedMay 18, 2026
Alimonynouncourt-ordered support paid by one spouse to another after they are separatedverifiedMay 18, 2026
Alinementnounan organization of people (or countries) involved in a pact or treatyverifiedMay 18, 2026
Aliphatic CompoundnounMWEorganic compound that is an alkane or alkene or alkyne or their derivativeverifiedMay 18, 2026
Aliquantnounan integer that is not an exact divisor of some quantityverifiedMay 18, 2026
Aliquant PartnounMWEan integer that is not an exact divisor of some quantityverifiedMay 18, 2026
Aliquot PartnounMWEan integer that is an exact divisor of some quantityverifiedMay 18, 2026
Aliteratenouna person who can read but is disinclined to derive information from literary sourcesverifiedMay 18, 2026
Aliterate PersonnounMWEa person who can read but is disinclined to derive information from literary sourcesverifiedMay 18, 2026
Alivenessnounthe condition of living or the state of being aliveverifiedMay 18, 2026
AliyahnounverifiedMay 15, 2026
Alizarinnounan orange-red crystalline compound used in making red pigments and in dyeingverifiedMay 18, 2026
Alizarin CarminenounMWEany of various acid dyesverifiedMay 18, 2026
Alizarin CrimsonnounMWEany of various acid dyesverifiedMay 18, 2026
Alizarin RednounMWEany of various acid dyesverifiedMay 18, 2026