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abaction(law) Carrying away by force, especially of animals.abderianFoolish; absurd; ridiculous; inclined to incessant merriment or laughter.abductin(biochemistry) An insoluble elastic protein found in the hinge ligament of bivalve mollusks.abiocoenThe non-living components of an environment, such as water, soil, air, etc.ablastin(immunology) An immunoglobulin G antibody efficient against some protozoans, specifically Trypanosoma lewisi, by preventing reproduction.ablation(surgery) The surgical removal of a body part, an organ, or especially a tumor; the removal of an organ function; amputation.ablutionThe act of washing something.abluvion(Late Modern, obsolete, rare) That which is washed off.abogeninAn organic compound found in Adenium boehmianum.aborgoin(US, dialectal, rare) An aboriginal inhabitant; a Native American.aborigenAlternative form of aboriginaborigin(obsolete) Aboriginal.abortion(medicine) The expulsion from the womb of a foetus or embryo before it is fully developed, with loss of the foetus.abrasionThe act of abrading, wearing, or rubbing off; the wearing away by friction.abrationMisspelling of abrasion.abscisinAlternative spelling of abscissin.abutilonAny of the various tropical flowering plants of the genus Abutilon, such as the flowering maple, Indian mallow, or Chinese lantern.acacetinA glycoside forming in the leaves of the common locust tree; C₁₆H₁₂O₅.acanthin(zoology, dated) strontium sulfate, the main constituent of the skeletons of the AcanthareaacaridanSynonym of acarid.accorgan(music) A musical instrument combining an electronic keyboard with an accordion.accussin(Chester) disputing, wranglingacedoben(organic chemistry) 4-acetamidobenzoic acid, a component of some pharmaceutical preparations including inosine pranobex.acedoxinA particular steroid glycoside.acetogen(biology) Any organism that generates acetic acid or acetate as a product of acetogenesis.achtbein(mathematics, physics) Synonym of octad.acidocinAny of a class of bacteriocins produced by Lactobacillus acidophilus.acidogenAny acidogenic organismacivicinA glutamine analogue antimetabolite, used as an antineoplastic agent.aclidianThat lacks claviclesacnistinA steroidal lactone found in Acnistus species.aconitinArchaic form of aconitine.acrichinThe antimalarial drug quinacrine hydrochloride.acridianAny of the family Acrididae of grasshoppers, crickets, locusts etc.acrolein(organic chemistry) A pungent, acrid, poisonous liquid aldehyde, CH₂=CH-CH=O, made by the destructive distillation of glycerol.acromion(anatomy) The outermost point of the shoulder blade.acropsin(biochemistry) Any of a group of opsins found in corals of the genus Acropora.actedronThe drug amphetamine.actineon(obsolete) Obsolete form of actinon (“radon-219”), an isotope of radon.actinianA sea anemone (of the order Actiniaria).actisignSynonym of sinsign.acuation(rare) The act of sharpening.acuition(obsolete) Synonym of acuation (“act of sharpening”).acutobin(biochemistry) Any of a group of serine glycoprotein proteases.adaptionAlternative form of adaptation.addition(uncountable) The act of adding anything.adeption(obsolete) An obtaining; attainment.adhesionThe ability of a substance to stick to an unlike substance.adipolin(biochemistry) A particular adipokine, encoded in humans by the FAM132A gene.aditerenA diuretic drug.admedian(anatomy) Near the median planeadmotion(obsolete) The process of admoving; motion toward something.adnation(botany) The fusion of different floral verticils or sets of organs.adolapin(biochemistry) An analgetic, antiinflammatory polypeptide present in bee venomadonidin(organic chemistry) A glucoside found in the plant Adonis vernalis (false hellebore, pheasant's eye).adoptian(Christianity) A proponent of adoptianism.adoptionThe act of adopting.adpersonAn adman or adwoman.adustionThe act of burning, or heating to dryness; the state of being thus heated or dried.advillin(biochemistry) A gelsolin that regulates the morphogenesis of neuronsadvowson(UK, ecclesiastical law) The right to present a nominee to a vacant ecclesiastical benefice or church office.adynaton(rhetoric) A form of hyperbole that uses exaggeration so magnified as to express impossibility; an instance of such hyperbole.adynerinA particular steroid glycoside.aegypiinAny vulture of the subfamily Aegypiinaeaegyptin(biochemistry) Any of a group of proteins present in the salivary gland of the mosquito (Aedes aegypti)aequorin(biochemistry) A photoprotein, isolated from luminescent jellyfish and other marine organisms, composed of two distinct units: the apoprotein apoaequorin and the prosthetic group coelenterazine.aerarianAn aerarius; the lowest class of citizen in Ancient Rome.aerationThe process by which air is circulated through or mixed with a substance such as soil or a liquid.aerobian(archaic) aerobicaesculinAlternative form of esculin.aethrianAny noctuoid moth in the genus Aethria.affixionThe act of affixing; affixation, affixment, attachment.affusionThe pouring of liquid, especially as a hydrotherapy.afikomanAlternative spelling of afikomen.afikomen(Judaism) The matzoh eaten at a Passover seder, after dinner.aftanoonPronunciation spelling of afternoon.aftersunDescribing a cooling or moisturizing lotion applied to the skin after exposure to the sun, especially to soothe sunburn.agaricin(organic chemistry) An organic tricarboxylic acid (fatty acid) found in fungi.agatoxinAmy of a family of polypeptide toxins present in the venom of Agelenopsis aperta and similar spidersagglutin(immunology, medicine, rare) Any antibody that causes agglutination of cells.aggrecan(biochemistry) A proteoglycan, containing chondroitin sulfate, that is a major component of cartilageagitoxinA peptide toxin in the venom of some scorpionsagnathan(zoology) Belonging or pertaining to the superclass Agnatha, the jawless vertebrates.agnationconsanguinity by a line of males only, as distinguished from cognationagnition(obsolete) Acknowledgement.agraphonAny of the sayings of Jesus found in various ancient texts but not in the four Gospels.agrarianOf, or relating to, the ownership, tenure and cultivation of land.agrotownSynonym of agrocity.airblownAlternative spelling of air-blown.airdrawnvisionary; imaginary; lacking foundation in realityairwomanA woman who flies in an aircraft; a female aviator.albondin(pharmacology, biochemistry) A cell receptor that binds albumin.albutoin(pharmacology) An anticonvulsant drug.aldermanA member of a municipal legislative body in a city or town.aldermenplural of aldermanaleation(art, rare) Aleatoricism.aleurain(biochemistry) A protease, found in barley, related to cathepsinalfaquinAlternative form of alfaqui.algocyan(organic chemistry, archaic) A blue pigment found in algae, soluble in water and glycerol, with intense red fluorescence.alightenTo alight, to dismount or get down from.alizarin(organic chemistry) A red substance, 1,2-dihydroxyanthraquinone, extracted from madder root and used as a dye.alkanninA natural dye and naphthoquinone derivative obtained from the borage plant Alkanna tinctoria, used as a food colouring and in cosmetics.alkargen(obsolete, organic chemistry) cacodylic acidalkarsin(organic chemistry) cacodylallergen(medicine) A substance which causes an allergic reaction.allerionAlternative form of alerion.allision(nautical) The striking of a vessel against a fixed object; the act of alliding or an instance thereof.allotwinA twin crystal whose individuals are oriented crystal associations of different polytypes of the same compoundallovein(surgery) A vein from a donorallthornThe plant Koeberlinia spinosa.allusionAn indirect reference; a hint; a reference to something supposed to be known, but not explicitly mentioned.alluvion(law) The increase in the area of land due to the deposition of sediment (alluvium) by a river.almandinAlternative form of almandine.alnusiin(organic chemistry) A particular ellagitannin.alsatianAlternative letter-case form of Alsatian.alstoninAlternative form of alstonine.alternan(biochemistry) The glucan produced by the enzyme alternansucrase.althesin(medicine) A hypnotic agent that is a mixture of alphaxalone and alphadolonealuminonThe triammonium salt of aurintricarboxylic acid, commonly used as a dye to detect the presence of the aluminium ion in an aqueous solution.alunogen(mineralogy) An aluminium sulfate mineral often found on the walls of mines and quarries.alveicinA particular bacteriocin produced by the bacterium Hafnia alvei.alveolin(biochemistry) A type of protease similar to astacinamanitin(biochemistry) A deadly amatoxin found in Amanita phalloides (the death cap), the four destroying angels (Amanita bisporigera, Amanita ocreata, Amanita verna, and Amanita virosa), and some other amanitas.amatoxin(toxicology) Any of a class of toxic peptides produced by several mushrooms of the genus Amanita and others.amavadin(biochemistry) A complex anion, containing vanadium, found in some species of Amanita mushroomsambition(countable) An object of an ardent desire.amblygon(geometry, obsolete, rare) An obtuse-angled shape, especially an obtuse triangle.ambrosin(numismatics) An early coin struck by the dukes of Milan, and bearing the effigy of St. Ambrose on its horseback.amedalinAn antidepressant drug, synthesised in the 1970s but never marketed.amelcorn(archaic) Any of several types of awned wheat having a high starch content, especially emmer (Triticum turgidum subsp. dicoccum).amelotin(biochemistry) A protein secreted by ameloblasts during tooth developmentamicetinA particular antibiotic isolated from Streptomycesamidogen(inorganic chemistry, dated) The amino radical, •NH₂, the neutral form of the amide ion −NH₂⁻, regardable as the ammonia molecule with one of its hydrogen atoms removed.amidulinsoluble starch, so rendered by boiling or treating with hydrochloric acidamikacin(pharmacology) A semisynthetic aminoglycoside antibiotic that is derived from kanamycin and is administered intravenously or intramuscularly in the form of its sulfate C₂₂H₄₃N₅O₁₃·2 H₂SO₄ to treat serious bacterial infections.amission(obsolete) deprivation; lossammonian(mineralogy) Containing ammonium cations.amoebeanDescribing a form of prosody (amoebaeum) featuring alternating responses.amoebian(zoology) One of the amoebae.amphisin(biochemistry) A cyclic lipoundecapeptide present in some strains of Pseudomonasamphoion(chemistry) zwitterionampliconA piece of DNA or RNA formed as the product of natural or artificial amplification events, as in a polymerase chain reactionamylogenThe water-soluble part of granulose.anangeon(rhetoric) A justification of an action by inevitability or necessity.anatoxinA bacterial toxin (usually an exotoxin) whose toxicity has been weakened or suppressedanchorin(biochemistry) Any of a group of collagen-binding proteins related to annexinanchusin(organic chemistry) alkanninanderoonObsolete form of anderun.androgen(biochemistry, steroids) Any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates. A male sex hormone such as testosterone or anabolic steroids.anemonin(organic chemistry) An acrid toxic substance obtained from some species of anemone.anisatin(organic chemistry) A toxic, insecticidal component of the shikimi plant (Illicium anisatum).annexion(obsolete) annexationanomuran(zoology) Any of the Anomura.anordrinA synthetic steroidal estrogen used as a postcoital contraceptive.antiarinEither of two cardiac glycoside poisons produced by the upas tree (Antiaris toxicaria).antidown(physics) Being or relating to an anti-down quark.antidyon(physics) The antiparticle of the dyon.antijoin(algebra, databases) A type of join, denoted by ▷, such that R▷S yields only those tuples in R for which S has no corresponding tuple of the same value.antikaon(particle physics) The antiparticle of a kaon.antimoonThe hypothetical analog of the Moon, revolving around the antiearth.antimuon(particle physics) A positively charged particle, the antiparticle corresponding to a muon.antipainPreventing or counteracting pain; analgesic.antiphonA devotional chant; a piece of music sung responsively.antipion(particle physics) The antiparticle of a pion.antiporn(informal) antipornographyantispinPreventing spin (of a component).apastron(astronomy) The point of greatest separation between a celestial object and the star which it orbits.apertion(archaic) The act of opening.apewomanA female apeman.apextrin(biochemistry) An extracellular protein associated with larval ectoderm evolution in some sea urchinsaphelian(astronomy) Relating to aphelionaphelion(astronomy, also figuratively) The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.apiarianPertaining to bees or beekeeping.apicidinA fungal metabolite that is an inhibitor of histone deacetylaseapigenin(organic chemistry) A flavone, found as a glycoside in many plants, that reverses the adverse effects of cyclosporineapitoxin(toxicology) The venom found in a honey bee's sting.apixaban(pharmacology) An anticoagulant drug for the treatment of venous thromboembolic events.apoareon(planetology) Alternative form of apoareion.apocynin(organic chemistry) A derivative of acetophenone that occurs in many plants; it has some potential medicinal propertiesapoideanRelating to bees of the superfamily Apoidea.apomucin(biochemistry) The apoprotein of a mucinaporphinAlternative form of aporphine.applagin(biochemistry) A particular disintegrin.aproptinMisspelling of aprotinin.apstatinAlternative form of apastatin.apyrogenAny apyrogenic materialaquarianOf or relating to an aquarium.aquathonAlternative form of aquathlon.aquation(chemistry) The replacement of a ligand by water in a complexarabinan(biochemistry) A polysaccharide that is mostly a polymer of arabinosearacytin(pharmacology) cytarabinearanotin(pharmacology) An antiviral drug.arboreanArchaic form of arboreal.arbutean(obsolete) Made from arbute, the wood of the strawberry tree.arcadianPertaining to an arcade.archaean(biology) Any organism of the domain Archaea.archaeonA prokaryotic organism; a member of the domain ArchaeaarchdeanA member of a discontinued Catholic ecclesiastical office, higher in rank than a dean.arenicinAny of a particular group of antimicrobial peptidesarfaptin(biochemistry) A protein (or associated domain) that interacts with ARF1argentannickel silverargillan(geology) A clay skin, a kind of cutan.armarianSynonym of armarius (“medieval monastery librarian”).armozeenA thick plain silk, generally black, used for clerical garments.arrestin(biochemistry) Any of a group of proteins that regulate signal transduction within cells.arrosion(medicine) The wasting away of a vessel wall under pressure.arsenian(mineralogy) Containing pentavalent arsenic.arsenoan(mineralogy) Containing trivalent arsenic.artesian(hydrology) Of a water supply, rising to the surface under its own hydrostatic pressure.artinianAlternative letter-case form of Artinian.arundoin(organic chemistry) The terpenoid ether (3R,3aR,5aR,5bR,7aR,9S,11aS,13aS,13bR)-9-methoxy-3a,5a,8,8,11a,13a-hexamethyl-3-propan-2-yl-1,2,3,4,5,5b,6,7,7a,9,10,11,13,13b-tetradecahydrocyclopenta[a]chryseneaschizan(entomology) Of or pertaining to the dipteran section Aschiza.ascidianAny member of the class Ascidiacea (the sea squirts)asclepinA particular steroid glycoside.assarionSynonym of as (“Ancient Roman coin”).assassinSomeone who intentionally kills a person, especially a professional who kills a public or political figure.assation(obsolete) Roasting, baking.assbrain(Canada, US, slang, sometimes considered vulgar, derogatory or offensive) An idiot; a fool.assclownA jerk; a buffoon; a person who is inept or ill-behaved to the point of being found laughable by others.asswagon(derogatory, slang, vulgar) A term of abuse.astacein(organic chemistry) A particular carotenoid.asterion(anatomy) The point on the side of the skull corresponding to the posterior end of the parietomastoid suture.astilbin(organic chemistry) A flavanonol found in Astilbe and other plants, used as an insecticide.astraean(zoology, obsolete) Relating to the former genus Astraea or the family Astraeidae.astrakanAlternative form of astrakhan.ataluren(organic chemistry, pharmacology) A novel small-molecular agent designed to make ribosomes become less sensitive to, or possibly ignore, premature stop codons.atlastin(biochemistry) Any of a family of proteins whose function is to fuse cell membranesatosiban(medicine) A medication that inhibits oxytocin and vasopressin, used to halt premature labour.atrophin(biochemistry) Any of a class of proteins found in nervous tissue.attaghanArchaic form of yataghan.attobarn(physics) A unit of surface area equal to 10⁻¹⁸ barns.audition(countable) A performance, by an aspiring performer, to demonstrate suitability or talent.aularian(UK, Oxford University) A member of a hall rather than a college.aurachin(organic chemistry) Any of a group of antibiotics that are quinolinone derivativesauraptenAlternative form of auraptene.aurelianPertaining to or resembling an aurelia; gold-coloured, golden.aureocinAny of a class of bacteriocins produced by Staphylococcus aureus.aureolinA yellow pigment used in painting, composed of potassium cobaltinitrite.aureusin(organic chemistry) The aurone glycoside 2-[(3,4-dihydroxyphenyl)methylidene]-4-hydroxy-6-[(2S,4S,5S)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1-benzofuran-3-oneauroreanBelonging to the dawn, or resembling it in brilliant hue.aurorianAlternative form of aurorean.autobahnThe high-speed intercity highways of Germany and Austria.autogain(electronics) automatic amplification of a signalautoiconSomething that serves as an icon representing itself.autojoin(databases, countable) A type of join from a table to itself.autosign(computing, transitive) To sign (a cryptographic certificate) automatically.avacopanA medication used to treat anti-neutrophil cytoplasmic autoantibody-associated vasculitis.avenacinAny of a group of antimicrobials present in oats (Avena sativa).avenalinA globulin or legume-like protein found in oats.avercornA reserved rent in corn, formerly paid to religious houses by their tenants or farmers.aversionOpposition or repugnance of mind; fixed dislike often without any conscious reasoning.averufinA chemical compound produced when averantin is acted upon by two different enzymes, a hydroxylase and an alcohol dehydrogenase.avialianAny extinct dinosaur of the clade Avialae, together with any living descendant of class Aves (the birds).aviarianPertaining to or resembling an aviary ("a place for keeping birds confined").aviationThe art or science of making and flying aircraft.avulsion(medicine, pathology) The loss or separation of a body part, either by surgery or due to trauma.axewomanA woman who uses an axe.axiation(biology) The development of an axis (and subsequent polarity) in an embryoaxigluon(physics) A proposed class of gluon that has chiral colorayegreenThe houseleek (Sempervivum tectorum).ayubowan(Sri Lanka) Salutation wishing the recipient a long life, typically as a greeting or a goodbye.azaloxanAn antidepressant drug, developed in the 1980s but never marketed.azamulinAn antimicrobial solution.azimexonA particular synthetic immunostimulant.azuresinA complex of the azure dye 3-amino-7-dimethylamino-phenazathonium chloride coupled with carbacrylic cationic exchange resin.