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20 Letter Words Starting With A

Explore 118 English words that start with A and contain exactly 20 letters. Common examples include acetylstrophanthidin, acetylsulfaguanidine, agroclimatologically, angiocatheterization, angioencephalography.

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20-Letter A Words by Ending Letter

All 118 20-Letter Words Starting With A

abdominohysterectomy(surgery) Removal of the uterus via an incision made in the abdominal wall rather than via the vagina.abequosyltransferase(biochemistry) A transferase that catalyzes certain reactions involving abequoseabetalipoproteinemia(pathology) A rare autosomal recessive disorder that interferes with the normal absorption of fat and fat-soluble vitamins from food.abstractionisticallyIn an abstractionistic way.acetamidomethylation(organic chemistry) Reaction with an acetamidomethyl protecting groupacetylaminopeptidase(biochemistry) Any enzyme that catalyzes the removal of acetylmethionine from the amino terminus of a protein (especially from an actin)acetylcholinesterase(biochemistry) An enzyme that catalyzes the hydrolysis of the neurotransmitter acetylcholine into choline and acetic acid.acetyldihydrocodeine(pharmacology) A particular narcotic painkiller and antitussive.acetylgalactosaminyl(organic chemistry) The univalent radical derived from acetylgalactosamine.acetylhexosaminidase(biochemistry) Any enzyme that catalyses the hydrolysis of terminal acetylhexosamine residues of acetylhexosaminidesacetylmethylcarbinol(organic chemistry) acetoinacetylstrophanthidin(organic chemistry) A cardiac glycoside, derived from plants like Strophanthus gratus, used for its digitalis-like effects in treating heart conditions.acetylsulfaguanidineAn acetyl derivative of sulfaguanidine.achondroplasiaphobia(rare, humorous) The fear of little people, or dwarfs (those with short stature).acoustocerebrographyacoustic cerebrographyactuopaleontologicalRelating to actuopaleontologyacylglycerophosphate(organic chemistry) phosphatidateadenosquamocarcinoma(pathology) An adenosquamous carcinoma.adenosylhomocysteine(biochemistry) An adenosyl derivative of homocysteine that is an intermediate in the biosynthesis of cysteineadenosylmethioninase(biochemistry) The enzyme adenosylmethionine cyclotransferase.adenotonsillectomize(surgery) To perform or to undergo adenotonsillectomyadrenocorticosteroid(biochemistry, biochemistry) adrenal corticosteroidadrenocorticotrophicAlternative form of adrenocorticotropic.adrenocorticotrophin(biochemistry) adrenocorticotropic hormoneadrenoleucodystrophyAlternative form of adrenoleukodystrophy.adrenoleukodystrophy(medicine) A degenerative genetic disease in which myelin is lost from nerve cells in the brainaerophotographicallyIn terms of or by means of aerophotography.aerothermoelasticity(physics) The study of the effects of thermodynamic heating and loading on elastic materials or structures.afterdepolarizationsplural of afterdepolarizationagrobiotechnologicalRelating to agrobiotechnologyagroclimatologicallyIn terms of agroclimatology.agrometeorologicallyIn terms of agrometeorology.alkylaminooxadiazole(organic chemistry) Any alkylamino derivative of an oxadiazolealkylhydroperoxidase(biochemistry) Any hydroperoxidase that reduces an alkyl peroxide to the corresponding alcoholallohexaploidization(biology) The replication of the genome of an organism to form an allohexaploidallopolyploidisationAlternative form of allopolyploidization.allopolyploidization(genetics) The process of allopolyploid formationallyltrichlorosilane(organic chemistry) The organosilicon compound CH₂=CH-CH₂-SiCl₃alphaproteobacterialOf or pertaining to the alphaproteobacteriaalphaproteobacteriumAny proteobacterium of the class Alphaproteobacteriaaminoacyltransferase(biochemistry) Any acyltransferase enzyme that acts upon an amino group.aminoethylpiperazine(organic chemistry) A derivative of piperazine, a corrosive liquid ethyleneamine with one primary, secondary and tertiary nitrogen atom.aminoexotripeptidaseThe enzyme tripeptide aminopeptidase.aminopolycarboxylateA salt or ester of aminopolycarboxylic acid.anatomicophysiologicRelating to anatomy and physiology.anatomophysiological(anatomy, physiology) anatomical and physiologicalangiocatheterizationThe catheterization of the blood vessels.angioencephalographyAn X-ray examination of the blood vessels in the brain.anhydroglucopyranose(biochemistry) The pyranose form of anhydroglucoseanopisthographicallyIn an anopisthographic manner.antennulariellaceous(mycology) Belonging to the family Antennulariellaceae.anterodorsolaterallyIn an anterodorsolateral manner or directionanthropogenealogicalanthropocenic and genealogicalanthropogeographical(anthropology) Of or relating to anthropogeography.anthropomorphisationAlternative spelling of anthropomorphization.anthropomorphizationendowing with human qualities.anthropopathetically(theology, rare) Exhibiting human emotions.anthroposociologicalOf or relating to social anthropology.antianthropocentrismOpposing anthropocentrism.antianthropomorphismOpposition to anthropomorphism.antiarteriosclerosisAlternative form of antiarteriosclerotic.antiarterioscleroticThat counters arteriosclerosisantiatherothromboticCountering atherothrombosis.antiauthoritarianismOpposition to authority; the quality of being antiauthoritariananticollaborationistOne who opposes collaboration or collaborationism.anticonfederationistOne who opposes confederation.anticonservativenessThe condition of being anticonservativeanticonstitutionally(law) In an anticonstitutional manner.antidisestablishmentOpposed to the separation of church and state.antiencephalitogenicPreventing encephalitis.antienvironmentalismOpposition to environmentalism.antienvironmentalistAlternative form of anti-environmentalist.antiestablishmentismOpposition to the political or cultural establishment.antiferroelectricity(physics) The property associated with antiferroelectric materialsantiferroquadrupolar(physics) antiferromagnetic and quadrupolarantiglucocorticoidalAlternative form of antiglucocorticoid.antihyperinsulinemicThat counters hyperinsulinemiaantihypersensitivityThat counters hypersensitivityantiinstitutionalismAlternative spelling of anti-institutionalism.antiinstitutionalistUncommon spelling of anti-institutionalist.antimiscegenationistOne who favours antimiscegenation.antimulticulturalismOpposition to multiculturalism.antiosteoclastogenicThat prevents the formation of osteoclastsantiphosphothreonine(immunology, of an antibody) That binds to phosphothreonine.antipsychoanalyticalOpposing psychoanalysis.antirepresentational(philosophy) Opposing representationalism.antitachydysrhythmia(medicine) Countering tachydysrhythmia.antitachydysrhythmic(medicine) Countering tachydysrhythmia.antitransglutaminase(biochemistry, immunology) Targeting transglutaminase.appendicovesicostomy(surgery) The conversion of the appendix into a conduit for urine from the bladderarachidonoylglycerol(organic chemistry) An endocannabinoid that is an arachidonoyl derivative of glycerol.archaeoentomologicalRelating to ancient insectsarchaeomalacological(paleontology) relating to archaeomalacologyarchaeometallurgical(archaeology) Relating to archaeometallurgy.archaeomusicologicalRelating to archaeomusicology.archaeopalynologicalRelating to archaeopalynologyarchaeoseismologicalRelating to archaeoseismologyarchaeostratigraphicRelating to the archaeological study of strata (typically as a means of establishing chronology)architecturalizationAdaptation to architectural purposes.arylsulfotransferase(biochemistry) A sulfotransferase enzyme that transfers a sulfate group from phenolic sulfate esters to a phenolic acceptor substrate.arytenoepiglottideanSynonym of aryepiglottic.asialotetraantennary(biochemistry) Describing a tetraantennary oligosaccharide that has no sialic acid componentasthenoteratospermia(medicine) Asthenoteratozoospermia.astrochronologicallyBy means of astrochronology.atheroprotectivenessThe condition of being atheroprotectiveatherosusceptibilityThe condition of being atherosusceptibleatherothromboembolicRelating to atherothromboembolism.atherothrombogenesisThe origination of atherothrombosis.autobiographicalnessThe quality of being autobiographical.autodeubiquitinationThe autoregulation of deubiquitination.autoethnographicallyIn terms of, or by means of, autoethnography.autohemagglutinationSynonym of autoagglutination.autohistoradiography(medicine) A form of historadiography that uses radioisotopes instead of X-raysautohydrogenotrophic(biology) Both autotrophic and hydrogenotrophicautopolyploidisationAlternative form of autopolyploidization.autopolyploidization(genetics) The process or the result of becoming autopolyploidautoradiographicallyBy means of autoradiographyautostereoscopicallyIn an autostereoscopic manner

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