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abacterialNot caused by bacteria; characterized by a lack of bacteria.abchalazal(biology) On the side facing away from the chalaza of a seed.abediterol(pharmacology) An experimental drug candidate for the treatment of asthma and chronic obstructive pulmonary disease.abgerminalAway from a germ or ovaryablationalOf or relating to ablation.ablepticalAlternative form of ableptic (“blind”).aboriginalFirst according to historical or scientific records; original; indigenous; primitive.abortional(rare) Pertaining to abortion; miscarrying; abortive.abranchial(zoology) Lacking gills.abrasionalPertaining to abrasion; formed by abrasion.abrosexualOne who is abrosexual.absinthialOf or pertaining to wormwood; absinthian.abtemporal(grammar) Of or relating to the grammatical aspect which expresses an action which started before the primary action of a statement, and which is still ongoing.abterminal(anatomy, of an electrical current in a muscle) Away from the end and towards the centreacademicalPertaining to a university or other form of higher education.acanonicalNot canonicalacaricidalDeadly to acarids.accidentalPertaining to accident and not essence; thus, inessential; incidental; secondary.accipitralPertaining to, or of the nature of, a falcon or hawk; hawklike.acebrocholA steroid drug with sedative effects.acebutolol(pharmacology) A beta blocker (trademark Monitan, Sectral) which is partially selective for cardiac beta receptors, used in the treatment of hypertension, angina, and arrhythmia.acetylenyl(organic chemistry) Any radical derived from an acetylene, but especially ethynylachronical(astronomy) Alternative form of achronic.achronycalAlternative form of acronycal.acleithralLacking a cleithrumacousticalOf or pertaining to hearing or acoustics.acrofacial(anatomy, pathology) Of, pertaining to, or affecting the face and the hands or feetacrolectal(linguistics) Of or pertaining to an acrolect, or standard dialectacronychalAlternative form of acronycal.acropodialRelating to, or characteristic of, an acropodium.acrosticalLike an acrostic.acroterialPertaining to an acroterium.actinozoal(zoology, obsolete) Of or pertaining to the obsolete class of animals, Actinozoa.acylphenol(organic chemistry) Any acyl derivative of a phenoladaptionalRelating or pertaining to adaptation, or the action of adapting.adaptorialTending to adapt or fit; adaptive.additionalSupplemental or added to something.addressful(archaic) adroit; resourcefuladelmidrolA mast cell stabilizer.adenoviral(medicine) Of, pertaining to, or caused by an adenovirusadgerminalTowards a germ or ovaryadhesionalRelating to adhesion.adialectalNot dialectal.adiaphoralBeing or relating to an adiaphoron.adjectival(grammar) Of or relating to or functioning as an adjective.admarginalAlong a marginadonitoxolA particular steroid glycoside.adoptionalOf or relating to adoption.aegosexualSynonym of autochorissexual.aelurophilAlternative form of ailurophile.aerationalOf or relating to aeration.aerofaunalRelating to aerofaunaaggresomalRelated to an aggresomeagnosticalAlternative form of agnostic.agresticalObsolete form of agrestic.agronomialSynonym of agronomic.ahnentafelA genealogical numbering system for listing a person's direct ancestors.ailurophilAlternative form of ailurophile.ajapsandalAlternative form of ajapsandali.alaryngealWithout the use of the larynx.alchemical(alchemy) Of or pertaining to the medieval chemical science and philosophy of alchemy.aldosterolMisspelling of aldosterone.alfentanil(pharmacology) A synthetic short-acting opioid with analgesic and local anesthesia enhancing activity.alfentanylMisspelling of alfentanil.algaecidalAlternative spelling of algicidal.alikreukel(South Africa) giant periwinkle, Turbo sarmaticusalkadienyl(organic chemistry) Of, pertaining to, or derived from an alkadienealkaloidal(organic chemistry) Of or pertaining to alkaloids.alkanediol(organic chemistry) A diol (a compound with two hydroxy groups) derived from an alkane which may be linear or branched.alkanediyl(organic chemistry) Any of a series of divalent radicals of the general formula CₙH₂ₙ derived from aliphatic hydrocarbons. Unless specified otherwise, such alkanediyls include substituted alkanediyls.alkylmetal(organic chemistry) Any aliphatic organometallic compound.allergicalDated form of allergic.allosexual(LGBTQ, of a person) Experiencing sexual attraction; not asexual.allylmetal(organic chemistry) An organometallic compound with an allyl group attached to a metal atom.alopurinolMisspelling of allopurinol.alphaviralRelating to alphaviruses.alprenololA drug used to treat angina.altrilocal(grammar) Indicating altrilocality, i.e. the occurrence of an event in a location other than that of the speaker.ambersnailAny of the genus Oxyloma of air-breathing land snails.ambilinealOf or pertaining to both sides of a family.ambiregnal(taxonomy, of a protist) Classified into the taxonomic schemes of two different kingdoms of life simultaneously, either as Protozoa and Algae or as Protozoa and Fungi.ambisexual(zoology) Hermaphroditic.amblygonal(geometry, obsolete) obtuse-angledambosexual(rare) Alternative form of ambisexual (“hermaphroditic, or unisex”).ambulacralOf or pertaining to an ambulacrumamebicidal(American spelling) Alternative form of amoebicidal.amfecloralA stimulant drug formerly used as an appetite suppressant.amicrobialNot containing microbesamidoalkyl(organic chemistry) Any amido derivative of an alkyl radicalaminoalkyl(organic chemistry, especially in combination) Any amino derivative of an alkyl radicalaminoallyl(organic chemistry, especially in combination) An amino derivative of an allyl radical.aminobutyl(organic chemistry) Any amino derivative of a butyl radicalaminoethyl(organic chemistry, especially in combination) The univalent radical NH₂CH₂CH₂- derived from ethylamineaminohexyl(organic chemistry, especially in combination) Any amino derivative of a hexyl radical.aminothiol(organic chemistry) Any amino derivative of a thiolaminovinyl(organic chemistry) An amino derivative of a vinyl radicalammoniacalPertaining to or containing ammonia.ammoniumyl(inorganic chemistry) The univalent inorganic radical cation NH₃^(+.) derived from ammonia; azaniumylammosexual(slang, derogatory) A person obsessed with owning guns; a zealous supporter of the right to bear arms.amnesticalAlternative form of amnestic.amoeboidalAlternative form of ameboid.amosulalolA beta blocker drug.amphenicol(medicine) Any of a class of antibiotics related to chloramphenicolamphidinol(organic chemistry) A polyhydroxy polyene, present in marine dinoflagellates of the genus Amphidinium, that is an antifungal agentamphiesmalRelating to snakes of the genus Amphiesmaamphivasal(botany) In which the xylem surrounds the phloemamplitudal(rare) Synonym of amplitudinal (relating to amplitude)anaerobialAlternative form of anaerobic.analogicalOf, pertaining to, based on, or composed of an analogy.analyticalOf or pertaining to analysis; resolving into elements or constituent partsanapleuralSynonym of anaplerotic.anatomicalOf or relating to anatomy or dissection.ancestoral(less common) ancestralancestrallObsolete form of ancestral.ancestrial(dated) Ancestral.androcidalOf or pertaining to androcide.androecial(botany) Relating to the androeciumandropetal(botany) A petal that is derived from a modified stamenaneurismalAlternative spelling of aneurysmal.aneurysmalOf, pertaining to, or causing aneurysmsanguishfulFull of anguish.anilingual(rare) Of or pertaining to anilingus.anisopirolAn antipsychotic drug.anniversalOccurring yearly; annual.anogenital(anatomy) Of, or relating to, the anus and genitals.anothermalHaving a decreasing temperature with increasing water depth.anovaginal(anatomy) Relating to the anus and vagina.anovesicalRelating to the anus and urinary bladder.anteapical(anatomy) Located in front of an apex.antechapelThe outer part of the west end of a chapel.antecostalRelating to an antecostaantefurcalRelating to an antefurcaantegonial(anatomy) anterior of the gonionantemedial(entomology) Situated before (i.e. closer to the head than) the middle of the thorax or wing.antepartal(medicine) Antepartum.antescutalanterior to a scutum (of an insect)anteverbalPrior to being verbal (using words).anthranoyl(organic chemistry, especially in combination) A univalent radical formally derived from anthranilic acid by removal of the hydroxyl groupantianimalDesigned to kill animals.antiborealSynonym of austral.anticartelOpposing or countering cartels.anticausalNot dependent on past states or valuesanticlinalInclining or dipping in opposite directions.antidental(dentistry, in combination) That counters a dental conditionantidromal(neurology) antidromicantifeudal(politics) Opposing a feudal system.antifibrilAny antifibrillar drugantifungal(pharmacology) That inhibits the growth of fungi; antimycotic.antigerbil(immunology, of an antibody) Reacting with the immunoglobins found in gerbils.antiglobalOpposed to globalization.antigospel(Christianity) Opposing the gospel.antilarvalCounteracting larvae.antimedial(geometry) Being a triangle formed by three lines parallel to the sides of an original triangle ABC: the parallel to AB through C, the parallel to AC through B, and the parallel to BC through A.antimonialAny drug or medical preparation containing antimony.antineuralSynonym of antineuronal.antinomialSynonym of antinomic.antinormalAntagonistic to or causing deviations from that which is considered normal.antiphonalA book of antiphons or anthems sung or chanted at a liturgy; an antiphonary or antiphoner.antiportal(computer graphics) A defined plane or volume that can never be seen through, and which thus reduces the number of calculations involved in rendering a three-dimensional scene.antiracialAlternative form of anti-racial.antirecoilPreventing recoil.antiritualOpposing a ritual or rituals.antischoolOpposed to schools.antiseptol(medicine) The quaternary ammonium compound benzethonium chloride that is used as a detergent and antiseptic.antisexualOpposing or disapproving of sexual intercourse.antisocialUnwilling or unable to cooperate and associate normally with other people.antispiral(astronomy) Of or relating to a theorem stating that no stable spiral modes of oscillation exist, in general, in a gaseous galaxy.antisprawl(urban studies) Opposing or countering urban sprawl.antitravelOpposing or preventing travel.antitropal(botany) antitropousantivandal(law enforcement) Opposing or proscribing vandalism.antiverbal(literature, semiotics) Opposing or avoiding the use of speech or words.antorbital(anatomy) Situated to the front of the orbit of the eyeantronasal(anatomy) Relating to an antrum and its associated nasal cavityanumericalNot numerical; outside the realm of numbers.aortocaval(anatomy) relating to the aorta and the vena cavaaortorenal(anatomy) Relating to the aorta and kidney.apagogicalAlternative form of apagogic.aparthotelA form of hotel having self-catering apartments instead of bedrooms or suites.aphthongal(phonology) Being or relating to an aphthong.apicobasal(anatomy) Relating to an apex and a baseaplacental(zoology) Lacking a placenta.apocolpial(palynology) Relating to a region bounded by colpi.apocryphal(Christianity) Of, or pertaining to, the Apocrypha.apographalOf or relating to the apograph of a manuscript.apoliticalHaving no interest or involvement in politics.apological(literature) Relating to an apologueapophysealOf or pertaining to an apophysis.apophysialUncommon form of apophyseal.aporeticalTending to doubt.apothecial(lichenology) Relating to the apothecium.apozemical(medicine, obsolete) Of or relating to a decoction or infusion.appendicalOf, relating to, or of the nature of an appendix or appendices (chiefly of books).approximalNear or adjacentapterygial(zoology) That lacks limbs, fins or wings.aqueductal(neuroanatomy) Relating to the cerebral aqueduct.aquicludalRelating to an aquiclude.aquitardalRelating to an aquitard.arabinitol(organic chemistry) The sugar alcohol (2R,4R)-pentane-1,2,3,4,5-pentolarabinosyl(biochemistry, especially in combination) The univalent radical derived from arabinosearachidoyl(organic chemistry, especially in combination) A univalent radical formally derived from arachidic acid by removal of the hydroxyl group.archetypalOf or pertaining to an archetype.arctogaealAlternative form of arctogeal.arenaviral(virology) Of or pertaining to arenaviruses.argialboll(soil science) A form of alboll that has an argillic horizon but not a natric horizon.argumental(linguistics) Based on arguments; pertaining to arguments.argyrophilSynonym of argyrophilic.aromatical(rare) aromatic.arotinolol(pharmacology) An alpha/beta blocker medication.arsinediyl(organic chemistry) an arsanylidenearthrodial(anatomy) Of or pertaining to arthrodia or to an arthrosisarthroidalMisspelling of arthrodial.artificialMan-made; made by humans; of artifice.arylmethyl(organic chemistry, especially in combination) Any aryl derivative of a methyl groupascogonialRelating to ascogonia.asegmentalNot segmentalasigmoidalNot sigmoidalasoprisnil(pharmacology) An investigational selective progesterone receptor modulator.asparginylMisspelling of asparaginyl.aspartidyl(organic chemistry, especially in combination) A univalent radical formed from aspartic acid by removal of a hydrogen atom from the amino groupasphericalNot spherical or nearly spherical.aspiritualNot spiritual.asterismal(astrology) Relating to asterisms.asteroidalOf or pertaining to an asteroid.asthenical(archaic) asthenicastroglial(medicine) Of or pertaining to the astrocytes, the star-shaped glial cells of the brain and spinal cordastroviralOf or relating to astroviruses.asymmetral(obsolete) incommensurableatallatallAlternative form of atall.athyroidalNot thyroidalatramentalOf or relating to ink; inky; black.atriocaval(anatomy) Relating to the atrium and the vena cava.atrionodal(anatomy) atrial and nodalattributalRelating to attributes.audiogyralRelating to the effect of movement of the head on localization of soundsaudiovocalRelating to orally produced sound.auncestralObsolete form of ancestral.aureonitol(organic chemistry) A fungi-derived tetrahydrofuran.autacoidalOf or relating to an autacoid.autocancel(transitive) To cancel (a previously posted message on Usenet) automatically.autogeneal(archaic) Self-produced; autogenous.automanual(historical, telephony) Being or relating to a system of telephony that combines automatic and manual features, such that the caller initially communicates with an operator who, after setting up the desired number on a keyboard, has no further interaction with the call.automutual(mathematics) Autocorrelated and mutual.autophagalAlternative form of autophagous.autopistol(science fiction) An automatic pistol.autopodialRelating to an autopodiumautopsical(obsolete) autopsicautopticalAlternative form of autoptic.autoscroll(graphical user interface, video games) To scroll automatically.autosexualBeing, or pertaining to, sex with oneself.aviatorialRelating to aviation.axiobuccalRelating to, or dividing the axial and buccal planes of a toothaxiolabialRelating to, or dividing the axial and labial walls of a toothaxiomesialRelating to, or dividing, the axial and mesial walls of a tooth.axiopulpalRelating to, or dividing, the axial and pulpal walls of a tooth.axoplasmalAlternative form of axoplasmic.azidoethyl(organic chemistry, especially in combination) Any azido derivative of an ethyl groupazimuthialAlternative form of azimuthal.aziridinol(organic chemistry) Any alcohol derived from an aziridineazoindoxyl(organic chemistry) Any indoxyl that contains a two atom nitrogen group (-N=N-) uniting two hydrocarbon radicals, typically used for dyes in electron microscopy.