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Glossary · Nouns · A

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TermTypeDefinitionClassificationsUpdated
Alizarin YellownounMWEany of various yellow dyesverifiedMay 18, 2026
Alizarinenounan orange-red crystalline compound used in making red pigments and in dyeingverifiedMay 18, 2026
Alizarine RednounMWEa bright orange-red color produced in cotton cloth with alizarine dyeverifiedMay 18, 2026
Alkahestnounhypothetical universal solvent once sought by alchemistsverifiedMay 18, 2026
Alkalemianouna blood disorder characterized by a lower concentration of hydrogen ions in the blood (which rises above 7.45 on the pH scale)verifiedMay 18, 2026
Alkalinounany of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and waterverifiedMay 18, 2026
Alkali BeenounMWEa common solitary bee important for pollinating alfalfa in the western United StatesverifiedMay 18, 2026
Alkali GrassnounMWEplant of western North America having grasslike leaves and greenish-white flowersverifiedMay 18, 2026
Alkali MetalnounMWEany of the monovalent metals of group I of the periodic table (lithium or sodium or potassium or rubidium or cesium or francium)verifiedMay 18, 2026
Alkali PoisoningnounMWEpoisoning resulting from the ingestion of an alkali compound (as lye or ammonia)verifiedMay 18, 2026
Alkalimetrynounvolumetric analysis using standard solutions of alkali to measure the amount of acid presentverifiedMay 18, 2026
Alkaline MetalnounMWEany of the monovalent metals of group I of the periodic table, lithium or sodium or potassium or rubidium or cesium or franciumverifiedMay 18, 2026
Alkaline-Earth MetalnounMWEany of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)verifiedMay 18, 2026
AlkalinitynounpH values above 7verifiedMay 18, 2026
Alkalinurianouna condition in which the urine (which is normally slightly acidic) is alkalineverifiedMay 18, 2026
Alkalisernounan agent that counteracts or neutralizes acidity (especially in the stomach)verifiedMay 18, 2026
Alkalizernounan agent that counteracts or neutralizes acidity (especially in the stomach)verifiedMay 18, 2026
Alkaloidnounnatural bases containing nitrogen found in plantsverifiedMay 18, 2026
Alkalosisnounabnormally high alkalinity (low hydrogen-ion concentration) of the blood and other body tissuesverifiedMay 18, 2026
Alkalurianouna condition in which the urine (which is normally slightly acidic) is alkalineverifiedMay 18, 2026
Alkanenouna series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)verifiedMay 18, 2026
Alkane SeriesnounMWEa series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)verifiedMay 18, 2026
Alkanetnounperennial or biennial herb cultivated for its delicate usually blue flowersverifiedMay 18, 2026
Alkaptonnounan acid formed as an intermediate product of the metabolism of tyrosine and phenylalanineverifiedMay 18, 2026
Alkaptonurianouna rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urineverifiedMay 18, 2026
Alkenenounany unsaturated aliphatic hydrocarbonverifiedMay 18, 2026
Alkynouna person who drinks alcohol to excess habituallyverifiedMay 18, 2026
Alkydnouna durable synthetic resin widely used in adhesives and paintsverifiedMay 18, 2026
Alkyd ResinnounMWEa durable synthetic resin widely used in adhesives and paintsverifiedMay 18, 2026
Alkylnounany of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbonsverifiedMay 18, 2026
Alkyl GroupnounMWEany of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbonsverifiedMay 18, 2026
Alkyl HalidenounMWEorganic compound in which halogen atoms have been substituted for hydrogen atoms in an alkaneverifiedMay 18, 2026
Alkyl RadicalnounMWEany of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbonsverifiedMay 18, 2026
Alkylating AgentnounMWEan antineoplastic drug used to treat some forms of cancerverifiedMay 18, 2026
Alkylbenzenenounorganic compound that has an alkyl group bound to a benzene ringverifiedMay 18, 2026
Alkylbenzenesulfonatenounsulfonate of alkyl benzeneverifiedMay 18, 2026
Alkynenouna colorless flammable gas used chiefly in welding and in organic synthesisverifiedMay 18, 2026
All AroundernounMWEa versatile person who is expert at many thingsverifiedMay 18, 2026
All ClearnounMWEpermission to proceed because obstacles have been removedverifiedMay 18, 2026
All FoursnounMWEcard games in which points are won for taking the high or low or jack or gameverifiedMay 18, 2026
All Get OutnounMWEan unimaginably large amountverifiedMay 18, 2026
All Source IntelligencenounMWEIn the NICE Workforce Framework, cybersecurity work where a person: Analyzes threat information from multiple sources, disciplines, and agencies across the Intelligence Community. Synthesizes and places intelligence information in context; draws insights about the possible implications.CapabilityRestrictedCUIMay 9, 2026
All-Day SuckernounMWEhard candy on a stickverifiedMay 18, 2026
All-Or-None LawnounMWE(neurophysiology) a nerve impulse resulting from a weak stimulus is just as strong as a nerve impulse resulting from a strong stimulusverifiedMay 18, 2026
All-Roundernouna versatile person who is expert at many thingsverifiedMay 18, 2026
All-Terrain BikenounMWEa bicycle with a sturdy frame and fat tiresverifiedMay 18, 2026
Alla BrevenounMWEa musical time signature indicating two or four half notes to a measureverifiedMay 18, 2026
AllahnounMuslim name for the one and only GodverifiedMay 18, 2026
Allamandanouna plant of the genus Allamanda having large showy funnel-shaped flowers in terminal cymesverifiedMay 18, 2026
Allantoisnounthe vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)verifiedMay 18, 2026
Allayernouna person who reduces the intensity (e.g., of fears) and calms and pacifiesverifiedMay 18, 2026
Allegationnounstatements affirming or denying certain matters of fact that you are prepared to proveverifiedMay 18, 2026
Allegementnounstatements affirming or denying certain matters of fact that you are prepared to proveverifiedMay 18, 2026
Allegiancenounthe act of binding yourself (intellectually or emotionally) to a course of actionverifiedMay 18, 2026
Allegorisernounsomeone who communicates in allegoriesverifiedMay 18, 2026
Allegorizernounsomeone who communicates in allegoriesverifiedMay 18, 2026
Allegorynounan expressive style that uses fictional characters and events to describe some subject by suggestive resemblancesverifiedMay 18, 2026
Allegro Con SpiritonounMWElively with spiritverifiedMay 18, 2026
Allelenoun(genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same characterverifiedMay 18, 2026
Allelomorphnoun(genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same characterverifiedMay 18, 2026
Allemandenounegg-thickened velouteverifiedMay 18, 2026
Allemande SaucenounMWEegg-thickened velouteverifiedMay 18, 2026
Allen ScrewnounMWEa screw with a hexagonal hole in the headverifiedMay 18, 2026
Allen WrenchnounMWEa wrench for Allen screwsverifiedMay 18, 2026
Allergennounany substance that can cause an allergyverifiedMay 18, 2026
Allergic EczemanounMWEeczema caused by an allergic reactionverifiedMay 18, 2026
Allergic ReactionnounMWEhypersensitivity reaction to a particular allergenverifiedMay 18, 2026
Allergic RhinitisnounMWErhinitis caused by an allergic reactionverifiedMay 18, 2026
Allergistnouna physician skilled in the diagnosis and treatment of allergiesverifiedMay 18, 2026
Allergologynounthe branch of medical science that studies the causes and treatment of allergiesverifiedMay 18, 2026
Allergynounhypersensitivity reaction to a particular allergenverifiedMay 18, 2026
Allergy DietnounMWEa diet designed to avoid the foods that you are allergic toverifiedMay 18, 2026
Alleviantnounremedy that alleviates pain without curingverifiedMay 18, 2026
Alleviationnounthe feeling that comes when something burdensome is removed or reducedverifiedMay 18, 2026
Alleviatornouna therapist who makes suffering more endurableverifiedMay 18, 2026
Alleynouna lane down which a bowling ball is rolled toward pinsverifiedMay 18, 2026
Alley CatnounMWEa homeless catverifiedMay 18, 2026
Alleywaynouna narrow street with walls on both sidesverifiedMay 18, 2026
AllgoodnounEuropean plant naturalized in North AmericaverifiedMay 18, 2026
Alliaceous PlantnounMWEbulbous plants having a characteristic pungent onion odorverifiedMay 18, 2026
Alliancenouna formal agreement establishing an association or alliance between nations or other groups to achieve a particular aimverifiedMay 18, 2026
AllicenounEuropean shadverifiedMay 18, 2026
Allice ShadnounMWEEuropean shadverifiedMay 18, 2026
Alligator ClipnounMWEa clip with a spring that closes the metal jawsverifiedMay 18, 2026
Alligator GrassnounMWEprolific South American aquatic weed having grasslike leaves and short spikes of white flowersverifiedMay 18, 2026
Alligator PearnounMWEa pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seedverifiedMay 18, 2026
Alligator SnappernounMWElarge species having three ridges on its backverifiedMay 18, 2026
Alligator Snapping TurtlenounMWElarge species having three ridges on its backverifiedMay 18, 2026
Alligator WeednounMWEprolific South American aquatic weed having grasslike leaves and short spikes of white flowersverifiedMay 18, 2026
Alligator WrenchnounMWEa wrench with a v-shaped jaw and serrations on one side (resembles the open jaws of an alligator)verifiedMay 18, 2026
Alligatorfishnounsmall very elongate sea poachersverifiedMay 18, 2026
AllisnounEuropean shadverifiedMay 18, 2026
Allis ShadnounMWEEuropean shadverifiedMay 18, 2026
Alliterationnounuse of the same consonant at the beginning of each stressed syllable in a line of verseverifiedMay 18, 2026
Alliteratornouna speaker or writer who makes use of alliterationverifiedMay 18, 2026
Allmouthnounfishes having large mouths with a wormlike filament attached for luring preyverifiedMay 18, 2026
Alloantibodynounan antibody that occurs naturally against foreign tissues from a person of the same speciesverifiedMay 18, 2026
AllocationnounThe process an organization employs to determine whether security controls are defined as system-specific, hybrid, or common. The process an organization employs to assign security controls to specific information system components responsible for providing a particular security capability (e.g., router, server, remote sensor).ProcessMay 12, 2026
Allocation UnitnounMWEa group of sectors on a magnetic disk that can be reserved for the use of a particular fileverifiedMay 18, 2026
Allocatornouna person with authority to allot or deal out or apportionverifiedMay 18, 2026