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abaperturalNot apertural; Away from the aperture.abductional(physiology) Relating to abduction.abiological(biology) Pertaining to inanimate things; not produced by organisms.abolitionalRelating to abolition.absolutival(grammar) Of or relating to the absolutive grammatical case.abundantial(linguistics) Expressing the idea of abundance.accessional(rare) Pertaining to accession; additional.accessorialOf or pertaining to an accessory, e.g. to a crime.accretionalOf, pertaining to, or formed by accretionaccusativalOf or pertaining to the accusative case.acefluranolA contrast agent used in ultrasound.acequinocyl(organic chemistry) The acaricide 2-(acetyloxy)-3-dodecyl-1,4-naphthalenedioneacetoacetyl(organic chemistry, especially in combination) The univalent radical CH₃CO-CH₂CO- derived from acetoacetic acidacetonitrilObsolete spelling of acetonitrile.achromophilachromatophilacinoductal(anatomy) Relating to an acinar ductaconceptualNot conceptual.acontextualWithout context.acrobaticalAlternative form of acrobatic.acrochordalRelating to the acrochordsacrocranial(of a skull) Pointed at the top.acronymicalAlternative form of acronymic.acrostichal(entomology, of bristles) Situated on the mesothorax of some dipteran fliesacrotarsialRelating to the acrotarsiumacyloxyacyl(organic chemistry, especially in combination) Any acyloxy derivative of an acyl groupadamantanol(organic chemistry) Either of two isomeric alcohols formally derived from adamantane by replacing a hydrogen atom with a hydroxy group, but especially the tertiary alcohol 1-adamantanoladamantanyl(organic chemistry) Alternative form of adamantyl.adiabaticalAlternative form of adiabatic.adiathermal(thermodynamics) adiabatic; not involving transmission of heatadjectionalPertaining to adjection; that is, or may be, annexed.adorationalRelating to adoration.adulticidalOf or pertaining to an adulticideadvectionalRelating to advection.adventitial(anatomy) Of or pertaining to the adventitiaadversarialCharacteristic of, or in the manner of, an adversary; combative, hostile, opposed.advertorialAn advertisement written in the form of an objective editorial, presented in a printed publication, and usually designed to look like a legitimate and independent news article.aerenchymalRelating to aerenchymaaerologicalRelating to aerology.aeromedicalOf or pertaining to aeromedicine.aeronomicalOf or pertaining to aeronomyaerospatialOf or pertaining to aerospace.aerothermal(physics) Relating to the heating of surfaces due to their contact with the flow of air or other gasesaestheticalOf or pertaining to aesthetics.affectionalPertaining to the affections; affective; characterized by emotionaffluentialaffluent and influentialaffrightful(obsolete) frightfulaflatoxicol(organic chemistry) The aflatoxin (3S,7R,16S)-16-hydroxy-11-methoxy-6,8,19-trioxapentacyclo[10.7.0.02,9.03,7.013,17]nonadeca-1,4,9,11,13(17)-pentaen-18-oneafterschoolTaking place immediately after school classes.afunctionalNot functional.agitationalRelating to, or having the character of, political agitationagitatorialOf or relating to agitators.agonistical(archaic) agonistic (of or relating to contests that were originally participated in by the Ancient Greeks).agrologicalRelating to agrology.agromineralAny mineral that has an agricultural use, either as a nutrient or a fertilizerahistoricalLacking historical perspective or context.ailourophilAlternative spelling of ailurophile.airplanefulEnough to fill an airplane.albeluvisol(soil science) A soil with a thin, dark surface horizon on a bleached subsurface horizon that tongues into a clay illuviation horizon.alcothermalAlternative form of alcohothermal.alexiterialSynonym of alexiteric.alfaprostol(pharmacology) A prostaglandin analogue.algebraicalPertaining to algebra or its laws.algological(botany) Of or pertaining to algology (the study of algae).aliturgical(of a day in the Christian calendar) On which the Eucharist is not offered.alkanethiol(organic chemistry) Any simple aliphatic thiol.alkenylacyl(organic chemistry, especially in combination) Any alkenyl derivative of an acyl radicalalkoxyalkyl(organic chemistry, especially in combination) Any alkoxy derivative of an alkyl radicalalkoxyethyl(organic chemistry, especially in combination) Any alkoxy derivative of an ethyl groupalkylphenol(organic chemistry) Any of a family of organic compounds obtained by the alkylation of a phenolallantoidal(anatomy) Of or relating to the allantois.allegoricalOf, relating to, or containing allegory.allopurinol(pharmacology) A synthetic drug which inhibits uric acid formation, used to treat gout and related conditions.allothermalHaving an external heat sourceallotypical(immunology, rare) Allotypic: of, due to, or pertaining to an allotype.allylnickel(organic chemistry) Any allyl organometallic compound of nickel.allylphenol(organic chemistry) Any allyl phenolalmightiful(obsolete, Early Modern) almighty; all-powerfulalprostadil(pharmacology) Prostaglandin E₁, a vasodilatory drug used in the treatment of erectile dysfunction.alternariolA toxic metabolite of Alternaria fungi, a major contaminant of cereals and fruits.altithermal(of a time period) Relatively warm (typically, between periods of glaciation)altitudinalOf or in relation to altitudeambidextralPertaining equally to the left and right sides.ambilateral(medicine) Affecting both sides of the body, or of an organ.ambilingual(linguistics) Having two languages that are used for any and all communications, where neither language is dominant.amenorrhealAlternative spelling of amenorrhoeal.amethodicalNot methodical; unsystematic.amfetaminilAlternative form of amphetaminil.amidomethyl(organic chemistry, especially in combination) Any amido derivative of a methyl radical (-CH₂-NH-CO-R)amidopropyl(organic chemistry) A propyl radical with an amine group substituted for a hydrogen atom.amillennial(Christianity) Of or relating to amillennialism.aminobenzyl(organic chemistry, especially in combination) Any amino derivative of a benzyl radicalaminomethyl(organic chemistry) The univalent radical NH₂CH₂- derived from methylamineaminopentyl(organic chemistry, especially in combination) Any amino derivative of a pentyl radicalaminophenol(organic chemistry) Any of three isomeric amino derivatives of phenol; hydroxyaniline.aminophenyl(organic chemistry, especially in combination) Any amino derivative of a phenyl radicalaminopropyl(organic chemistry) The univalent radical NH₂CH₂CH₂CH₂- derived from propylamineaminoquinolAn antiprotozoal drug.aminosterol(organic chemistry) Any amino derivative of a sterol, especially any of a group of such antibiotics obtained from sharksaminostyryl(organic chemistry, especially in combination) Any amino derivative of a styryl radicalaminouracil(organic chemistry) Either of two isomeric C-amino derivatives of uracil 5- or 6-amino-2,4-dihydroxypyrimidineamobarbital(pharmacology) A barbiturate administered especially in the form of its sodium salt C₁₁H₁₇N₂NaO₃ as a hypnotic and sedative; and as a supposed truth serum.amoebicidalRelating to substances which could destroy amoebae.amonoclonalNot monoclonalamphecloralAlternative form of amfecloral.amphiastralRelating to an amphiaster.amphiborealRelating to both sides of the North Atlantic Ocean.amphichiral(geometry, physical chemistry) superimposable on its mirror image; achiralamphitropal(botany, obsolete) amphitropousamplexicaul(botany, of leaves) Having lobes (usually auriculate) that completely surround the stem.ampullacealRelating to ampullaeanalepticalAlternative form of analeptic (“restoring or stimulating health”).anaphoricalSynonym of anaphoric.anathomicalMisspelling of anatomical.anatropicalSynonym of anatropic.androconialRelating to the androconiumandropodialRelating to an andropodiumandrosexualAttracted to men and/or to masculinity regardless of gender.androstanol(organic chemistry) Any alcohol derived from androstane, but especially 5a-androstane3a-ol.androstenol(organic chemistry) A steroid alcohol with a musk-like, found in human sweat and also in truffles.anecdoticalDated form of anecdotal.anelloviralRelating to anellovirusesanimationalOf or relating to animation.anisodactylCharacterized by anisodactyly.anniversallObsolete spelling of anniversal.anoperineal(anatomy) Relating to the anus and perineum.antecubital(anatomy) Pertaining to, or situated in the anterior or inner part of the elbow (cubitus)antehumeralAt the area immediately anterior to the basal portion of the wing of a dragonflyantemaritalBefore marriage.antenuptialOccurring before marriage; prenuptial.anteorbital(astronautics) Referring to the period before orbit is achieved.antepaschal(chiefly Christianity) Relating to the time before the Passover, or before Easter.anterobasal(anatomy) anterior and basalantesternal(anatomy) anterior to the sternumantesuturalAnterior to a suture; presutural.antevaginal(anatomy) anterior to the vaginaantheridial(botany) Of, pertaining to, or produced in, the antheridiumanthocodialRelating to the anthocodia.anthothecol(organic chemistry, medicine) The anticancer drug 17-(furan-3-yl)-6-hydroxy-4,4,8-trimethyl-3,7-dioxo-14,15-epoxyandrosta-1,5-dien-11-yl acetateanthracenyl(organic chemistry, especially in combination) A radical derived from anthraceneanthropicalAlternative form of anthropic.anthroposol(soil science) A soil that has been influenced by human cultivationantialcoholOpposed to the drinking of alcohol.antianginal(pharmacology) Any drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease.antibrothelOpposing brothels.anticapitalTending to erode the preservation of capital.anticontrol(chaos theory) The deliberate promotion or increase of chaos in a system.anticouncilA council set up in opposition to another council.anticrystala perfectly disordered solidanticubitalMisspelling of antecubital.antidotical(archaic) antidotalantifactualOpposing or going against the facts; false; delusional.antifederalAlternative form of anti-federal.antiliberal(politics) Opposing liberalism.antiliteralOpposing a literal interpretation of something.antilogicalGoing against logic.antimedicalOpposing medicine.antimusical(music) Opposing or countering music.antinaturalcontrary to natureantineutralOpposing a policy of neutrality.antinomicalRelating to antinomianism.antipluvial(rare) Combatting or protecting one from the rain.antiradical(biochemistry) Counteracting free radicals.antiremoval(historical) Opposing the forcible removal of Native American groups from their traditional homelands.antiretinal(immunology) Working against the retina.antispatialGoing against traditional notions of physical space.antispecial(mathematics) Metaplectic special.antistromalThat opposes sister chromatid cohesionantisudoralPreventing sweating.antitextualOpposing a text or textual conventions.antitumoral(oncology) antitumorantitypicalOf or pertaining to an antitype.aortomitral(anatomy) Relating to, or connecting the aortic and mitral valves of the heartaortoseptalRelating to the aorticopulmonary septumapartmentalOf or relating to apartment buildings.apatheticalSynonym of apathetic.apeirogonal(geometry) Having the form of an apeirogon.aperiosteal(surgery) That does not involve the periosteumapicifloral(botany) Having the flowers at the apexapicodental(phonetics) Made with the apex of the tongue touching the upper front of the teeth, as in apicodental stop.apicodistalApical and distal.apicodorsal(anatomy) apical and dorsalapicolabiallinguolabialapicomedial(anatomy) apical and medialapicoseptalRelating to an apicoseptumapicultural(agriculture) Relating to beekeeping.apiologicalRelating to apiology.apodictical(archaic) Apodictic; being clearly demonstrable; certain.apoptosomal(biology) Relating to apoptosomesapostolical(Christianity) Apostolic.apostrophalOf or relating to an apostrophe.apotrachealNot associated with vascular tracheidsappendagealRelating to appendages.appendiceal(anatomy) Of or pertaining to the appendix.appendicial(anatomy, medicine) Relating to the appendix.applauseful(rare) Full of applause.appresorialMisspelling of appressorial.aptitudinalRelating to aptitude.arachidonyl(organic chemistry) The univalent radical derived from arachidonic acid by loss of the hydroxyl grouparachnidial(zoology) Of or relating to the Arachnida.arachnoidal(anatomy) Pertaining to the arachnoid mater; arachnoid.arachnopial(anatomy) Relating to the arachnoid mater and the pia materarbaprostil(pharmacology) A prostaglandin analogue.arboricidalThat kills (or cuts down) treesarchegonial(botany) Relating to the archegonium.architravalOf or relating to an architrave.archliberalHaving, or relating to, very liberal political views.archmarshal(historical) The grand marshal of the Holy Roman Empire.arcological(urban studies) Of or pertaining to arcology.arcopallialRelating to an arcopalliumarctoborealRelating to the north Arcticareological(astronomy) Of or pertaining to the planet Mars.argentophilHaving an affinity for silver.arhythmicalArrhythmic, having no rhythm.arimoclomol(medicine) A drug, N-{[(2R)-2-hydroxy-3-piperidin-1-ylpropyl]oxy}pyridine-3-carboximidoyl chloride 1-oxide, that stimulates cellular protein repair.armodafinil(pharmacology) A stimulant-like drug, an active enantiomer of modafinil, being investigated for the treatment of various conditions such as depression, fatigue, and schizophrenia.arsenothiol(organic chemistry) Any thiol that is also an arsine derivative.artefactual(archaeology) Of or pertaining to artefactsarteriviralRelating to the arterivirusesarthriticalArchaic form of arthritic.arthropodal(zoology) Relating to the Arthropoda.artifactualOf or pertaining to artifact.artiodactyl(zoology) Any ungulate mammal with an even number of toes and belonging to the Artiodactyla, including pigs, sheep, deer, cattle, and most grazing animals. In contrast, horses have an odd number of toes and as such are not Artiodactyla, but Perissodactyla.arytenoidal(anatomy) Relating to the arytenoidsascaricidalThat kills roundworms (Ascaridida).ascensionalRelating to upward movement; pertaining to the act of rising or ascending.ascomycetalRelating to ascomycetesasparaginyl(organic chemistry, especially in combination) A univalent radical derived from asparagineaspidistralRelating to, or abounding in, aspidistras.assertionalOf or pertaining to assertionassertorialThat makes an assertion or positive statement; declaratory.assessorialRelating or belonging to an assessor.asthmaticalDated form of asthmatic.asyllabicalArchaic form of asyllabic.asymbolicalSynonym of asymbolic.atheisticalOf or relating to atheism; atheistic.atmologicalRelating to atmology.atrinositolAn antiplatelet and nonsteroidal anti-inflammatory drug.attentionalOf or pertaining to attention.attitudinalExpressive of or pertaining to attitude.attritionalOf or pertaining to attrition.attuitionalRelating to attuition.audiospinalRelating to sound and the movement of the spine and thus to a person's gaitaudiovisualContaining both aural and visual elements.authentical(archaic) Authentic.autoarousalSelf-arousal, in particular:autographal(obsolete) autographicautoinstall(computing) automatic installationautological(grammar, of a word, phrase, or especially an adjective) Possessing the property it describes.automagical(computing, technology, informal) Automatic, but with an apparent element of magic. Commonly referring to complex technical processes hidden from the view of users or operators, resulting in technology that "just works".automaticalArchaic form of automatic.autonomicalAlternative form of autonomic.autorenewalAutomatic renewal.autothermalThat is heated by the combustion of its own productsautozooidalRelating to or characteristic of an autozooid.auxologicalRelating to auxology.avenasterol(organic chemistry) Either of two isomeric sterols, related to cholesterol, found in some vegetable oilsaviculturalRelating to avicultureavocationalOf, relating to, or being an avocation.avolitionalOf or relating to avolition; lacking willpower.avunculocal(anthropology, of a society, culture, or system) Characterized by couples living with the husband's maternal uncle.axioincisal(dentistry) Relating to, or dividing the axial and incisal walls of a toothaxiolateralaxial and lateralaxiolingualRelating to, or dividing the axial and lingual walls of a toothaxiologicalOf or relating to value theory, the philosophical field of axiology.axiomaticalOf or pertaining to an axiom; having the nature of an axiom; characterized by axioms.axoskeletalMisspelling of exoskeletal.azacosterolA derivative of cholesterol in which two carbon atoms have been replaced with nitrogen.azacyclonolA drug used to diminish hallucinations in psychotics.azidoacetyl(organic chemistry, especially in combination) The azido derivative of the acetyl radical N₃-CH₂-CO-azidomethyl(organic chemistry, especially in combination) Any azido derivative of a methyl groupazygoportal(anatomy) azygos and portal