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macedovicinA peptide lantibiotic produced by Streptococcus macedonicusmachinationThe act of machinating or plotting.macranganin(organic chemistry) A particular ellagitannin.macroactionAn equivalence class of sequences of one or more microactions that all have the same starting state and the same terminal state.macrocarpin(organic chemistry) Any of a particular class of cytotoxic nortriterpenoid alkaloidsmacrocolumnA relatively large-scale columnmacrodomainA macroscopic domainmacrolactin(biochemistry) An antibacterial peptide produced by the silkworm Bombyx mori; the gene responsible for its productionmacrolichen(biology) Any lichen that has a large thallus, often resulting in a bushy appearance.macromyelon(obsolete, anatomy) Synonym of medulla oblongata.macronarianAny sauropod dinosaur of the clade Macronariamacronation(geopolitics, rare) A large country; a sovereign state of considerable size, population or both.macropodian(zoology, archaic) A macropod.macropteranAlternative form of macropterous.macroregionAny of several geopolitical subdivisions that encompass several others.macrosialin(biochemistry) A heavily glycosylated transmembrane protein associated with macrophagesmacrosporin(organic chemistry) The anthraquinone derivative 1,7-dihydroxy-3-methoxy-6-methyl-9,10-anthraquinone that is a bioactive metabolite produced by a plant-pathogenic fungus of the genus Stemphylium (family Pleosporaceae, order Pleosporales)macrostrain(physics) macroscopic strainmadefaction(obsolete) The act of madefying, or making something wet.madreporianResembling, or pertaining to, the genus Madrepora.madrigalianOf or relating to madrigals.maduramicinAn antiprotozoal agent used in veterinary medicine to prevent coccidiosis.mainmastmanA sailor assigned to the mainmastmalabathronAlternative form of malabathrum.malacosteon(pathology) Morbid softness of the bones; osteomalacia.maladaptionMisspelling of maladaptation.malcavernin(biochemistry) A signalling protein associated with cerebral cavernous malformationsmalefactionA crime, an offense, an evil deed.maleruption(dentistry) The abnormal eruption of a tooth.maleylation(organic chemistry) Reaction with maleic acid or a maleate derivativemalfixationIncorrect fixation (typically, in the wrong place)malfunctionFaulty functioning.maljunction(anatomy) anomalous union of the pancreatic and biliary ducts outside the duodenal wall.mallophaganA chewing louse, any louse of the now obsolete suborder Mallophaga, any true louse that is not a sucking louse.malposition(medicine) An abnormal position of an organ or other part of the body.malrotation(physiology) An anomaly of rotation; aberrant movement of parts in a rotating fashion.mamillationAlternative form of mammillation.mammaglobin(biochemistry) A particular secretoglobin protein, associated with breast cancermammoglobinAlternative form of mammaglobin.mammotropin(biochemistry) Prolactin; a peptide gonadotrophic hormone secreted by the pituitary gland that stimulates growth of the mammary glands and lactation in females.mancipation(obsolete) Slavery.manducationThe act of eating.manganesian(chemistry, archaic) manganicmangostanin(organic chemistry) The mangosteen metabolite 9-hydroxycalabaxanthonemannostatinA compound that inhibits the action of mannosidasemannosulfanA particular drug used in the treatment of cancer.manuduction(obsolete) The act of guiding or a means of guidance; direction, guidance, instruction.manumissionRelease from slavery or other legally sanctioned servitude; the giving of freedom; the act of manumitting.manutention(historical) Maintenance, upkeep of a person, place or thing.marenostrin(biochemistry) Synonym of pyrin.marginalianRelating to marginalia.marginationThe provision of marginsmarinomycinAny of a class of macrodiolide antibioticsmarkspersonA marksman or markswoman.marmorationA covering, casing or encrusting of marblemasculationMaking masculine; giving male characteristics.mastication(physiology) The process of chewing.mastodonianOf, related to, or characteristic of a mastodon; large; powerful.mastodonton(obsolete) mastodon, mastodont.materiarian(obsolete) A materialist; one who believes only in physical matter, or the material world.materiation(obsolete) The act of creating matter; materializationmatriglycan(biochemistry) A glycan that links dystroglycan to the basement membranemauritianin(biochemistry) A natural product: kaempferol 3-O-(2,6-di-O-alpha-L-rhamnopyranosyl)-beta-D-galactopyranosidemaurocalcinAlternative form of maurocalcine.measurationmeasurement; mensurationmeatatarianA person who exclusively or predominantly eats meat.mebhydrolinA particular antihistamine drug.mechanicianOne skilled in the theory or construction of machines.mecobalaminmethylcobalaminmedetomidinAlternative form of medetomidine.mediaperson(chiefly India) A member of the media.mediasation(British spelling) Alternative spelling of mediazation.mediazationThe increasing importance of broadcast and other rapid communications media relative to traditional means of communication.medisectionsurgical incision in the median linemedullationformation of medullated fibermegabillion(informal) A great number of billions.megacheiran(zoology) Any arthropod with a relatively large appendagemegamansionA very large mansion.megamillion(informal) A great number of millions.megapolitanOf or pertaining to a megapolis (“a very large city or urban complex”).megaprotein(biochemistry) An extremely large protein.megatherianRelating to, or characteristic of a megatheriummegavitaminInvolving megadoses of vitamins.melacacidin(organic chemistry) A particular leucoanthocyanidin compound.meliorationArchaic form of amelioration.memoisation(British spelling) Alternative spelling of memoization.memoization(computer science) A technique in which partial results are recorded (forming a memo) and then can be re-used later without having to recompute them.mendication(archaic) The act or practice of begging; beggary.menisperminAlternative form of menispermine.menostation(medicine, archaic, rare) menostasismenotrophinAlternative form of menotropin.menstrationMisspelling of menstruation.mensurationThe act or process of measuring; measurement.menthofuran(organic chemistry) The bicyclic monoterpenoid 3,6-dimethyl-4,5,6,7-tetrahydro-1-benzofuranmepartricinAn antibiotic.mephenytoin(pharmacology) An anticonvulsant drug C₁₂H₁₄N₂O₂.mercenarian(obsolete) A mercenary.merchantmanSynonym of merchant ship.merchantmenplural of merchantmanmercifixion(uncommon) The process of mercifying. (Now usually in reference to the treatment of Shylock in The Merchant of Venice.)mercuhydrinSynonym of meralluride.mercurophenThe germicide sodium oxymercury orthonitrophenolate.meridamycin(organic chemistry) A macrolide present in Streptomyces hygroscopicusmerochlorinAny of a class of meroterpenoid antibiotics produced by StreptomycesmesepimeronThe epimeron of the mesothorax of an insectmesolimnionThe layer of a lake between the monimolimnion and mixolimnion.mesomyarianAny sea anemone of the subinfraorder Mesomyariamesomyodian(obsolete, zoology) Any bird with a mesomyodous larynx, formerly classified un the superfamily Mesomyodi.mesonychianAny of several extinct carnivorous mammals of the order Mesonychia.mesopleuronThe lateral surface of the mesothoraxmesopsammonCommunity of small species that live in mesopsammic spaces where water is filtered between grains of sand and fine gravel.mesotrypsin(biochemistry) A trypsin isoform which is resistance to natural trypsin inhibitorsmestizationMiscegenation resulting in mestizos.metablastin(biochemistry) A cytosolic phosphoprotein that is involved in cell cycle regulationmetacrolein(chemistry) A polymeric modification of acrolein obtained by heating it with caustic potash.metacromion(anatomy) A process projecting backward and downward from the acromion of the scapula of some mammals.metaemotionFeelings (sentiment) about one's feelings (uncountable); a feeling about them (countable).metafictionA form of self-referential literature concerned with the art and devices of fiction itself.metagelatin(photography) A form of gelatin treated so that it remains fluid.metalimnion(in lakes) A thermocline.metallationAlternative spelling of metalation.metallician(obsolete, slang) A racing bookmaker.metalymnionAlternative form of metalimnion.metanephronAlternative form of metanephros.metapatternA large-scale pattern of other patterns.metapleuronAn exoskeletal plate on each side of the metathorax of an insectmetaprotein(biochemistry) Any protein derived from another by the use of acids or basesmetatarsianAlternative form of metatarsal.metatherian(zoology) Belonging or pertaining to the infraclass Metatheria of marsupials.metazoxolonA particular fungicide.metepimeronThe epimeron of an insect's metathoraxmetflurazonA pyridazinone herbicide with chemical formula C₁₃H₁₁ClF₃N₃O.methanation(organic chemistry) The reaction of hydrogen and carbon monoxide to form methanemethicillin(pharmacology) Alternative spelling of meticillin.methoxsalen(organic chemistry) A furanocoumarin drug used to treat psoriasis, eczema, vitiligo, and some cutaneous lymphomas in conjunction with exposing the skin to sunlight.methylation(chemistry) The addition of a methyl group to a molecule.methyprylonA piperidinedione sedative used for treating insomnia, now less commonly prescribed because of its side effects.methysticin(organic chemistry) A particular kavalactone.metricationA conversion to the use of the metric system; a metrification.metrization(mathematics) The process or result of metrizing a topological space.mezlocillin(pharmacology) A penicillin antibiotic.microactionA small-scale action by an individual.microcarpin(organic chemistry) A bianthraquinone obtained from Asphodesus microcarpus.microcolumnA very small chromatographic columnmicrocystin(biochemistry) Any of a class of cyclic oligopeptide hepatotoxins produced by cyanobacteriamicrodomain(biology) Any of several small regions of a cell membrane that has a distinct structure and a distinct functionmicrofusionfusion (thermal or nuclear) on a very small scalemicroglobin(biochemistry) Any microprotein that is a globinmicrokelvin(metrology) An SI unit of thermodynamic temperature equal to 10⁻⁶ kelvins. Symbol: μKmicrolactinA milk product produced by cows that have been treated with immunostimulantsmicrolesionA very small lesionmicrolesson(education) A very short lesson, typically lasting a few minutes.microlichenAny lichen with a very small thallus, resulting in a two-dimensional appearance.microlithon(geology) A small slab of rock having a earlier texture that lies between spaced foliation planes,micromotionA very small, or microscopic, motion.micronationSynonym of microstate (“a country that has a very small population and land area”).micronekton(zoology) Any very small crustacean and other free-swimming marine animal(s)micropatron(Internet) A funder in the system of micropatronage.micropersonA minuscule person.microplusin(biochemistry) An antimicrobial peptide present in the tick Rhipicephalus microplus.micropteranAlternative form of micropterous.microradianA unit of angle equal to one millionth of a radian.microregionAn administrative area in Brazil consisting of groups of municipalities bordering urban areasmicroribbonA microscopic ribbon.microscreenA screen (filter) that has a very fine meshmicrosiphon(biology) A very small siphonmicrostrain(physics) A strain expressed in terms of parts per million.microtrepan(surgery) A very small trepanmicroweaponA very small weapon, generally in the realm of high technology.microzymianOf or relating to microzymas.micturationMisspelling of micturition.micturition(physiology) Urination.midcampaignDuring a political campaign.middlewomanThe female equivalent of a middleman; a female intermediary.midecamycin(pharmacology) A macrolide antibiotic.midmountainAmid mountains; in a mountainous region.midostaurinA drug being investigated for the treatment of acute myeloid leukemia and myelodysplastic syndrome.midpositionIn a middle position.midquestionA point in time during which a question is being asked.migrastatinAn antineoplastic drug obtained from Streptomyces platensis.milfasartan(pharmacology) An angiotensin II receptor antagonist.millenarianPertaining to any of various religious or social movements which believe in a coming or ongoing radical change to existing world order.millidarwinA unit of evolutionary change equivalent to one thousandth of a darwin.millikelvinOne thousandth of a kelvinmillimicronA unit of length equal to one thousandth of a micron.millinewtonOne-thousandth of a newton.milliradianAn SI unit of plane angular measure equal to one thousandth of a radianmilnacipran(pharmacology) A psychoactive drug, an SNRI antidepressant also used to treat chronic pain, especially fibromyalgia.mimosamycinAn antibiotic, 7-methoxy-2,6-dimethyl-2H-isoquinoline-3,5,8-trione, isolated from Streptomycesminigastrin(biochemistry) A form of gastrin.minikitchenA small, compact kitchen.minimansionA small mansion; a mansionette.miniplasmin(biochemistry) A variant of plasmin that lacks one or more amino acids from the N-terminal positionminiprotein(biochemistry) A small protein (or a large polypeptide), especially one that folds into a structure similar to that of a normal proteinminisessionA brief sessionminisuctionA form of abortion in which the fetus or embryo, placenta, and membranes are removed by suction using a manual syringe.miniversionA miniature versionminkowskianAlternative letter-case form of Minkowskian.mipsagargin(medicine) A prodrug that is converted by the body into thapsigargin.mirabilysinA Proteus mirabilis metalloprotease virulence factormisadditionIncorrect addition.misbegotten(of a person) Born out of wedlock; illegitimate.misbehadden(Scotland) Alternative form of misbeholden.misbeholden(archaic) Disobliging; offensive or unkind.mischristen(transitive) To christen wrongly, for example giving the wrong name.miscitationincorrect citationmiscreationA faulty or unnatural making or creation.misdecisionA wrong decision; an instance of wrongly deciding.misdevotionMistaken, ineffective, or fake devotion.misdivisionIncorrect division, e.g. of a word.miserection(rare) The process of setting in an upright, erect position in a faulty or incorrect way.misfunctionSynonym of malfunction.misligation(biochemistry) Incorrect ligationmislocationmisplacementmislocutionincorrect locutionmismaintainTo maintain improperly; to provide inadequate maintenance.misnegation(neologism, informal linguistics) The unintended combination of semantic and grammatical negation such that the resulting statement actually means the opposite of what is wanted.mispositionTo position incorrectly.misreactionInappropriate reaction.misrelationerroneous relation or narrationmisreligion(archaic) False or wrong religion.misrotationincorrect rotationmissprision(law, rare) Obsolete spelling of misprision.mithramycin(pharmacology) UK form of plicamycin.mitoregulin(biochemistry) A microprotein that supports mitochondrial supercomplexesmixolimnionThe upper stratum of a meromictic lake; its waters are mixed by the wind.mnemonician(archaic) An instructor of mnemonics; someone who teaches how to improve or use the memory.molephantin(organic chemistry) A sesquiterpene lactone found in Elephantopus mollis.molestationThe act of molesting.mompetition(informal) Rivalry between mothers wishing to prove that they are better parents and/or have children who are more talented, well-behaved, etc.monascidian(biology) A simple organism, not compound or composite.mongolicain(organic chemistry) A particular ellagitannin found in Quercus mongolica, the Mongolian oak.monoarachin(organic chemistry) The monoglyceride of arachidic acidmonobaramin(creationism) Part or all of a holobaramin; a group of organisms believed to be related to by common descent in baraminology.monocardian(zoology) Having a heart with a single ventricle.monocarpianSynonym of monocarpic.monoctanoinA monoglyceride used to dissolve gallstones caused by cholesterol.monodendron(mathematics) A maximal connected subgraph of a dendrimer that shares only the coalescence node with a core.monoelaidin(organic chemistry) The monoglyceride of elaidic acidmonofectionAlternative form of monoinfection.monolimnionMisspelling of monimolimnion.monolinuronA selective systemic herbicide, pesticide and algaecide.monomyarian(zoology) Of or relating to the Monomya, bivalves having only one adductor muscle.monophagianA monophagous personmonosaposinA saposin formed by cleavage of a disaposin or trisaposinmonostearin(organic chemistry) A monoglyceride of stearic acidmonotrysianAny moth of the taxon MonotrysiamonoxerutinA particular flavonol.monstrationA kind of flash mob popular in Russia, where young people take to the streets with homemade banners and placards sporting absurd, non-political slogans.mordication(archaic) The act of biting or corroding.morgensternmorning star (spiked weapon)moronecidin(biochemistry) An antimicrobial peptide present in the striped bass (of genus Morone)morphotaxon(taxonomy) A taxon of a group of organisms classified according to morphology alonemorphothionThe insecticide O,O-dimethyl S-morpholinocarbonylmethyl phosphorodithioatemorsitation(obsolete, rare) The act of biting or gnawing, especially by insects.motorcabmanThe man who operates a motorcab.motorneuronAlternative spelling of motor neuron.mouillation(phonetics) The act of uttering the sound of a mouillé letter.moxibustion(folk medicine) The burning of moxa against the skin to treat pain or illness.mucoprotein(biochemistry) Any of a group of widely-distributed natural compounds that exist as complexes of proteins with mucopolysaccharides.mucronationThe property of being mucronate.multibaryonInvolving or pertaining to more than one baryon.multibuttonHaving or relating to more than one button.multicarbonAlternative spelling of multi-carbon.multicolumn(chiefly computing) Of or pertaining to more than one column.multidomainOf, pertaining to, or acting across multiple domainsmultigallonOf more than one gallon.multihadronInvolving multiple hadrons.multilectinRelating to, or employing multiple lectinsmultileptonInvolving multiple leptonsmultilesionHaving multiple lesionsmultimagnonInvolving multiple magnons.multinationOf or pertaining to more than one nation.multineuronInvolving multiple neuronsmultioptionThat involves multiple optionsmultipartonInvolving multiple partonsmultipeakonOf or relating to more than one peakon.multipersonOf or pertaining to more than one person.multiphononConcerning multiple phononsmultiphotonInvolving multiple photonsmultipistonInvolving, or comprising, more than one piston.multiregionAlternative form of multiregional.multiscreenHaving multiple screens.multiseasonOf or pertaining to more than one season.multistrainOf many strains (in various senses).multivoltinDated form of multivoltine.multiweaponOf or pertaining to more than one weapon.murmurationAn act or instance of murmuring.murrangatin(organic chemistry) A coumarin found in Murraya intermedia (syn. Murraya elongata).musclebrain(US, slang, derogatory) A large, strong, but inept, bumbling, buffoonish or unintelligent man.musclewomanAlternative form of muscle woman.musculation(anatomy) The muscular system of an animal, or of any of its partsmussitation(medicine) A comatose patient's action of forming words with their lips without producing sound.mutanolysin(biochemistry) A muralytic enzyme, obtained from Streptomyces, that is used in laboratories to degrade bacteria and to isolate DNAmutteration(nonce word) An act of muttering or complaining.mycoproteinA food product derived from fungus, the basis of Quorn.mycoredoxin(biochemistry) An oxidoreductase that reduces arsenates to arsenite, typically as a defence mechanism against arsenic poisoning.myelinationThe production of a coating of myelin around an axonmyofunctionThe function of a particular musclemyoglobulin(biochemistry) The globulin of muscle tissuemyohaematin(biology, archaic) cytochrome.myopalladin(biochemistry) A particular sarcomeric proteinmyopization(medicine) The development of myopia.myrmidonianConsisting of, or like, myrmidons.mythizationconversion into a mythmythologianA mythologist.myxopyronin(medicine) Any of several naturally-occurring antibiotics obtained from myxobacteriamyxosporeanA microscopic parasite of the class Myxosporea