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Glossary · Nouns · A

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TermTypeDefinitionClassificationsUpdated
Absolute ThresholdnounMWEthe lowest level of stimulation that a person can detectverifiedMay 18, 2026
Absolute ValuenounMWEa real number regardless of its signverifiedMay 18, 2026
Absolute ViscositynounMWEa measure of the resistance to flow of a fluid under an applied forceverifiedMay 18, 2026
Absolute ZeronounMWE(cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal)verifiedMay 18, 2026
Absolutenessnounthe quality of being complete or utter or extremeverifiedMay 18, 2026
AbsolutionnounverifiedMay 15, 2026
Absolutismnouna form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.)verifiedMay 18, 2026
Absolvernounsomeone who grants absolutionverifiedMay 18, 2026
Absorbancenoun(physics) a measure of the extent to which a substance transmits light or other electromagnetic radiationverifiedMay 18, 2026
Absorbatenouna material that has been or is capable of being absorbedverifiedMay 18, 2026
Absorbencynounthe property of being absorbentverifiedMay 18, 2026
Absorbent CottonnounMWEcotton made absorbent by removal of the natural waxverifiedMay 18, 2026
Absorbernoun(physics) material in a nuclear reactor that absorbs radiationverifiedMay 18, 2026
Absorptancenouna measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substanceverifiedMay 18, 2026
Absorptionnoun(physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a mediumverifiedMay 18, 2026
Absorption BandnounMWEa dark band in the spectrum of white light that has been transmitted through a substance that exhibits absorption at selective wavelengthsverifiedMay 18, 2026
Absorption CoefficientnounMWEa measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substanceverifiedMay 18, 2026
Absorption FactornounMWE(physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the bodyverifiedMay 18, 2026
Absorption IndicatornounMWEan indicator used in reactions that involve precipitationverifiedMay 18, 2026
Absorption SpectrumnounMWEthe spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengthsverifiedMay 18, 2026
Absorption UnitnounMWEa unit for measuring absorptionverifiedMay 18, 2026
Absorptivitynoun(physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the bodyverifiedMay 18, 2026
Abstainernounsomeone who practices self denial as a spiritual disciplineverifiedMay 18, 2026
Abstemiousnessnounmoderation in eating and drinkingverifiedMay 18, 2026
Abstentionnounthe trait of abstaining (especially from alcohol)verifiedMay 18, 2026
Abstinencenounact or practice of refraining from indulging an appetiteverifiedMay 18, 2026
Abstract ArtnounMWEan abstract genre of artverifiedMay 18, 2026
Abstract ArtistnounMWEa painter of abstract picturesverifiedMay 18, 2026
Abstract EntitynounMWEa general concept formed by extracting common features from specific examplesverifiedMay 18, 2026
Abstract ThoughtnounMWEthinking that is coherent and logicalverifiedMay 18, 2026
Abstractednessnounpreoccupation with something to the exclusion of all elseverifiedMay 18, 2026
Abstracternounone who makes abstracts or summarizes informationverifiedMay 18, 2026
Abstractionnounthe process of formulating general concepts by abstracting common properties of instancesverifiedMay 18, 2026
Abstractionismnouna representation having no reference to concrete objects or specific examplesverifiedMay 18, 2026
Abstractnessnounthe quality of being considered apart from a specific instance or objectverifiedMay 18, 2026
Abstractornounone who makes abstracts or summarizes informationverifiedMay 18, 2026
Abstrusenessnounthe quality of being unclear or abstruse and hard to understandverifiedMay 18, 2026
Abstrusitynounwisdom that is recondite and abstruse and profoundverifiedMay 18, 2026
Absurditynouna message whose content is at variance with reasonverifiedMay 18, 2026
Absurdnessnouna message whose content is at variance with reasonverifiedMay 18, 2026
Abulianouna loss of will powerverifiedMay 18, 2026
Abundancenoun(physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes presentverifiedMay 18, 2026
Abuse of DistressnounMWEa wrongful using of an animal or chattel distrained, by the distrainerverifiedMay 18, 2026
Abusernounsomeone who abusesverifiedMay 18, 2026
Abutmentnouna masonry support that touches and directly receives thrust or pressure of an arch or bridgeverifiedMay 18, 2026
Abutment ArchnounMWEan arch supported by an abutmentverifiedMay 18, 2026
Abutternounthe owner of contiguous propertyverifiedMay 18, 2026
Abvoltnouna unit of potential equal to one-hundred-millionth of a voltverifiedMay 18, 2026
Abwattnouna power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt)verifiedMay 18, 2026
Abysmnouna bottomless gulf or pitverifiedMay 18, 2026
Abyssnouna bottomless gulf or pitverifiedMay 18, 2026
Abyssal ZonenounMWEthe deep sea (2000 meters or more) where there is no lightverifiedMay 18, 2026
Acnounan electric current that reverses direction sinusoidallyverifiedMay 18, 2026
Acacianounany of various spiny trees or shrubs of the genus AcaciaverifiedMay 18, 2026
Academenounthe academic worldverifiedMay 18, 2026
Academianounthe academic worldverifiedMay 18, 2026
Academic AdministratornounMWEan administrator in a college or universityverifiedMay 18, 2026
Academic CostumenounMWEa costume worn on formal occasions by the faculty or students of a university or collegeverifiedMay 18, 2026
Academic DegreenounMWEan award conferred by a college or university signifying that the recipient has satisfactorily completed a course of studyverifiedMay 18, 2026
Academic DepartmentnounMWEa division of a school that is responsible for a given subjectverifiedMay 18, 2026
Academic FreedomnounMWEthe freedom of teachers and students to express their ideas in school without religious or political or institutional restrictionsverifiedMay 18, 2026
Academic GownnounMWEa gown worn by academics or judgesverifiedMay 18, 2026
Academic ProgramnounMWE(education) a program of education in liberal arts and sciences (usually in preparation for higher education)verifiedMay 18, 2026
Academic RelationnounMWEa professional relation between instructors and those they instructverifiedMay 18, 2026
Academic RequirementnounMWEa requirement for admission to or completion of an academic programverifiedMay 18, 2026
Academic RobenounMWEa gown worn by academics or judgesverifiedMay 18, 2026
Academic SessionnounMWEthe time during which a school holds classesverifiedMay 18, 2026
Academic TermnounMWEthe time during which a school holds classesverifiedMay 18, 2026
Academic YearnounMWEthe period of time each year when the school is open and people are studyingverifiedMay 18, 2026
Academiciannounsomeone elected to honorary membership in an academyverifiedMay 18, 2026
Academicianshipnounthe position of member of an honorary academyverifiedMay 18, 2026
Academicismnounorthodoxy of a scholastic varietyverifiedMay 18, 2026
Academismnounorthodoxy of a scholastic varietyverifiedMay 18, 2026
Academynounan institution for the advancement of art or science or literatureverifiedMay 18, 2026
Acanthanounany sharply pointed projectionverifiedMay 18, 2026
Acanthionnounthe craniometric point at the anterior extremity of the intermaxillary sutureverifiedMay 18, 2026
Acanthocephalannounany of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spinesverifiedMay 18, 2026
Acanthocytenounan abnormal red blood cell that has thorny projections of protoplasmverifiedMay 18, 2026
Acanthocytosisnounthe presence of acanthocytes in the blood stream (as in abetalipoproteinemia)verifiedMay 18, 2026
Acantholysisnouna breakdown of a cell layer in the epidermis (as in pemphigus)verifiedMay 18, 2026
Acanthomanouna neoplasm originating in the epidermisverifiedMay 18, 2026
Acanthopterygiannouna teleost fish with fins that are supported by sharp inflexible raysverifiedMay 18, 2026
Acanthosisnounan abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis)verifiedMay 18, 2026
Acanthosis NigricansnounMWEa skin disease characterized by dark wartlike patches in the body foldsverifiedMay 18, 2026
Acanthusnounany plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowersverifiedMay 18, 2026
Acanthus FamilynounMWEwidely distributed herbs and shrubs and treesverifiedMay 18, 2026
Acapnianouna state in which the level of carbon dioxide in the blood is lower than normalverifiedMay 18, 2026
Acaracidenouna chemical agent used to kill mitesverifiedMay 18, 2026
Acardianouncongenital absence of the heart (as in the development of some monsters)verifiedMay 18, 2026
Acariasisnouninfestation with itch mitesverifiedMay 18, 2026
Acaricidenouna chemical agent used to kill mitesverifiedMay 18, 2026
Acaridnounvery small free-living arachnid that is parasitic on animals or plantsverifiedMay 18, 2026
Acaridiasisnouninfestation with itch mitesverifiedMay 18, 2026
Acarinenounmite or tickverifiedMay 18, 2026
Acariosisnouninfestation with itch mitesverifiedMay 18, 2026
Acaroid ResinnounMWEan alcohol-soluble resin from Australian treesverifiedMay 18, 2026
Acarophobianouna morbid fear of small insects and mites and wormsverifiedMay 18, 2026
Acarusnounany of several mites of the order AcarinaverifiedMay 18, 2026
Acaryotenouna cell without a nucleus (as an erythrocyte)verifiedMay 18, 2026
Acataphasianouna disorder in which a lesion to the central nervous system leaves you unable to formulate a statement or to express yourself in an organized mannerverifiedMay 18, 2026