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dactinomycin(pharmacology) Actinomycin D.dalfopristin(pharmacology) A streptogramin antibiotic derived from pristinamycin.damenization(music, historical) A singing system resembling solfeggio, developed by German composer and tenor Carl Heinrich Graun (1704-1759), and using the syllables da, me, ni, po, tu, la, be, to.danofloxacin(pharmacology) A fluoroquinolone antibiotic used in veterinary medicine.darbepoietinAlternative form of darbepoetin.darinaparsin(organic chemistry, medicine) An organoarsenic compound, (2S)-2-amino-5-[[(2R)-1-(carboxymethylamino)-3-dimethylarsanylsulfanyl-1-oxopropan-2-yl]amino]-5-oxopentanoic acid, that has antineoplastic activitydasiglucagonA medication used to treat severe hypoglycemia in people with diabetes.dataficationThe process of datafying.dativization(grammar) Conversion into a dative form.daunorubicin(pharmacology) A synthetic anthracycline antibiotic C₂₇H₂₉NO₁₀ which is a nitrogenous glycoside that interferes with DNA synthesis and is used in the treatment of acute leukemia and other cancers.deactivationThe act of deactivating something, such as a bomb or alarm.deactylationMisspelling of deacetylation.deadaptationadaptation to a previous formdeadsorptionAlternative form of desorption.dealkylation(organic chemistry) The removal of alkyl groups from a compounddeallocationThe act of deallocating.deambulationAn instance of deambulation; a trip, journey, peregrination, itineration, or pilgrimage.deannexationThe process of removing an annex.deaspirationThe act, process or result of deaspirating.debacchation(archaic) wild raving or debauchery, as if drunk.debilitationThe act or process of debilitating, or the condition of one who is debilitated; weakness.deboronation(organic chemistry) The removal of a boronic group from a compound.debutyration(organic chemistry) Any reaction that removes one or more butyl groups from a molecule.decabrachianAny cephalopod of the suborder DecabrachiadecapitationBeheading; the act of beheading or decapitating.decasyllabon(obsolete) A line of ten syllables.decatenation(chemistry) The unlinking of the components of a ring or chain structure.decatungsten(inorganic chemistry, in combination) Ten atoms of tungsten in a chemical compound (W₁₀).decavitationThe removal or prevention of cavitation.deceleration(uncountable) The act or process of decelerating.decentrationThe removal of something from a centre.decolorationAlternative spelling of decolouration.decommissionTo take out of service or to render unusable.decompaction(chiefly in geology, biochemistry) The act or process of making something less compact; often specifically the reversal of previous compactiondeconflationThe act or process of deconflating.decongestionThe process of decongesting something.deconversionUndoing or dissolution of conversion.decoronation(dentistry) The removal of the crown of an ankylosed tooth while leaving the roots untouched.decrustationThe removal of a crust (various senses).decumulationThe process of decumulating; in chemistry, any exothermic molecular change that converts a cumulated diene to a conjugated diene.dedecoration(graph theory) Decimation (the elimination of points from a lattice); the inverse of decoration.dedispersionThe act of dedispersing.deescalationAlternative form of de-escalation.deethylation(organic chemistry) The removal of ethyl groups from a molecule.deetiolation(biology) The conversion of the etioplasts and plastids of an etiolated plant into chloroplastsdeexcitation(physics) The change in state as an excited state releases a quantum of energy.defatigation(dated) Fatigue; weariness.defederationThe breakup of a federation or alliance.defeminationdefeminizationdefibulation(surgery) A procedure to partially repair female genital mutilationdefiguration(obsolete) disfiguration; mutilationdefiltrationThe removal of material from the pores of a filter.deflagrationThe act of deflagrating; an intense fire; a conflagration or explosion. Specifically, combustion that spreads subsonically via thermal conduction.defraudation(obsolete) The act of defrauding; a taking by fraud.degemination(phonetics, uncountable) The inverse process of gemination, when a spoken long consonant is pronounced for an audibly shorter period.degeneration(uncountable, countable) The process or state of growing worse, or the state of having become worse.deglaciation(climatology, paleontology) The removal of all glacial land ice from a region, usually by melting.deindexation(finance) The removal of indexation (index-linking of a monetary value).deinoxanthin(organic chemistry) A carotenoid (5R)-5-hydroxy-3-[(1E,3E,5E,7E,9E,11E,13E,15E,17E,19E,21E)-24-hydroxy-3,7,12,16,20,24-hexamethylpentacosa-1,3,5,7,9,11,13,15,17,19,21-undecaenyl]-2,4,4-trimethylcyclohex-2-en-1-one present in Deinococcus radioduransdeiodination(chemistry) The removal of iodine from a compound (especially from iodothyronine).deionisationAlternative spelling of deionization.deionization(physical chemistry) The use of ion exchange to remove ionic substances from a solutiondelaceration(obsolete) An act of tearing into pieces.delafloxacin(pharmacology) A fluoroquinolone antibiotic.delaminationThe separation of the layers of a laminar composite material as a result of repeated stress, or failure of the adhesivedelapidationDated form of dilapidation.delftibactinA peptide siderophore, present in bacteria of the genus Delftia, that can detoxify golddeliberationCareful discussion and examination of the reasons for and against a measure.delicatessenA shop that sells cooked or prepared foods ready for serving.delikatessenAlternative spelling of delicatessen.delimitationThe act of delimiting something.delipidation(biochemistry) The removal of lipids or lipid groups, often from a protein.deliquiationAlternative form of deliquation.delithiation(physics) The removal of lithium from an electrode of a lithium-ion batterydelitigation(obsolete) telling-off; brawldelobulationThe removal of lobulesdeltamethrinA pyrethroid insecticide.demedication(medicine) Elimination or reduction of the use of a medication, or reduction of the level of a medication in the body.demetalationAlternative form of demetallation.demiculverin(now historical) A medium cannon, slightly larger than a saker and smaller than a culverin.demodulationThe inverse of the effect of modulation, or applying a signal to a carrier.demonisation(British spelling) Alternative spelling of demonization.demonizationThe act of demonizing.demospongeanAlternative form of demospongian.demospongianRelating to the demosponges.demotivationA feeling or state of being demotivated.demucilationThe process or the result of demucilating.denaturationThe deliberate addition of a noxious substance to alcohol to make it unfit to drinkdenivelation(hiking, cycling, trail running) the difference in level between the highest and lowest part of the track, regardless of starting or ending pointdenizenationThe act of making a denizen; naturalization.denomination(uncountable) The act of naming or designating.denucleation(biology, medicine) Deprivation of the nucleus.denunciationProclamation; announcement; a publishing.deoccupationCessation of occupation (occupying) of a place.deoppilation(obsolete) The removal of an obstruction.deordination(ecclesiastic, obsolete) disorder; dissolutenessdeoxybenzoin(organic chemistry) benzyl phenyl ketone, which can be considered as benzoin with one oxygen atom removed.depeculation(obsolete) robbery or embezzlement.deplantationThe removal of plants from beds; uprootingdepopulationThe act of depopulating or condition of being depopulated; the destruction or expulsion of inhabitants.depositationThe act of depositing, or material that is deposited.depreciationThe state of being depreciated; disparagement.deprehension(obsolete) A catching in the act; discovery (of a misdeed)deprojection(mathematics) The reverse process of a projection, in which the original figure is reproduced.deprotection(chemistry) The removal of a protecting group.depsidomycinAny of a group of cyclic heptadepsipeptide antibiotics present in ginseng rootsdepupylation(biochemistry) The removal of conjugated PUP proteindepurination(biochemistry, genetics) The removal, by hydrolysis, of a purine base from DNAdeputisationAlternative spelling of deputization.deputizationThe process of becoming a deputy.deracinationThe act of deracinating; uprooting.deratization(humorous or nonstandard) Extermination of rats, especially aboard a merchant vessel.deregression(mathematics) The removal of association between variablesderegulationThe process of removing constraints, especially government-imposed economic regulation.derepression(genetics) The inactivation of a repressor gene.deresinationThe process, or the result of deresinatingdermabrasionA cosmetic medical procedure in which the surface of the epidermis of the skin is removed by abrasion, typically to remove scarring or sun-damaged skin.dermasurgeonA dermatologist who specializes in dermasurgery.dermatotoxinSynonym of dermatoxin.derubylation(biochemistry) Removal of the protein "RUB" related to ubiquitindesalinationThe process of removing salt from sea water in order to make drinking water.desaturation(chemistry) the conversion of a saturated compound to an unsaturated one by removing hydrogen or other atoms to form a double bonddeselenation(organic chemistry) The removal of selenium from a compounddesertomycinAny of a class of macrocyclic lactone antibiotics isolated from StreptomycesdesiderationThe act of desiderating.desilicationAny process that removes silicon from a materialdesilylation(chemistry) The removal of a silyl groupdesmopressinA synthetic replacement for vasopressin.desmostylianOf or pertaining to the Desmostylia, an extinct order of marine mammals.despeciation(biology, taxonomy) The loss of a unique species of animal due to its combining with another previously distinct species.despoilationA spoiling or ruining; destruction.despoliationA stripping or plundering; spoliation.desponsation(archaic) A betrothing; betrothaldesquamation(medicine) The shedding of the outer layers of the skin.dessertspoonA unit of measure, being equivalent to two teaspoons or two-thirds of a tablespoon, or approximately 10 millilitres; a dessertspoonful.desulphationAlternative form of desulfation.detartrationThe process of detartrating, i.e. removing tartrates, especially from fruit juices and wines, in order to reduce tartness or sourness.dethiobiotinSynonym of desthiobiotin.dethiolation(organic chemistry) Any reaction that removes a thiol groupdetitanationAny process that removes titanium from a material.detonization(archaic) detonationdetoxication(biochemistry) Any metabolic process by which the toxicity of a material is reduceddetransition(intransitive, LGBTQ) To revert to one's original gender presentation, role, or identity.detrectation(obsolete) Drawing back; refusal; withdrawal.detritiationModification of a tritiated compound by the replacement of tritium atoms with normal hydrogendetruncation(archaic) truncation (the act of lopping off, or shorteningdetubulationThe removal or severing of a tubule (especially the T tubules of the heart).deuteriationThe addition of deuterium to something; deuterationdeuterolysin(biochemistry) A metalloproteinase present in aspergillusdevalidationThe removal of validationdevaporation(archaic) condensation (the change of vapour into water, as in the formation of rain).devegetationThe removal of vegetation.dexibuprofen(pharmacology) A nonsteroidal anti-inflammatory drug, the active dextrorotatory enantiomer of ibuprofen.dextriferron(medicine) A colloid of ferric hydroxide and partially hydrolyzed dextrin used in the treatment of anemiadialecticianSomeone knowledgeable about dialects.dialkylation(organic chemistry) An alkylation reaction that adds two alkyl groups.diaphoenicon(archaic) An electuary made with dates.diatoxanthinA type of xanthophyll found in phytoplankton and diatoms.dibenzofuran(organic chemistry) The tricyclic heterocycle in which two benzene rings are fused to that of furan; any of its derivatives, especially the halogenated derivatives that are similar to dioxinsdibenzopyran(organic chemistry) Either of two isomeric tricyclic aromatic heterocycles formed by the fusion of two benzene rings to one of pyrandichlorophen(organic chemistry) An anticestodal agent, 2,2'-methylenebis(5-chlorophenol).dictionarian(rare) Synonym of lexicographer.dictyopteranAny of the polyneopterous insects of the order Dictyoptera: the termites, cockroaches and mantidsdiencephalon(neuroanatomy, anatomy) The region of the human brain, specifically the human forebrain, that includes the thalamus, the hypothalamus, the epithalamus, the prethalamus or subthalamus, and the pretectum.diezeugmenon(music) The last tetrachord, in the case where two tetrachords were placed separately from each other, but with only the interval of a tone between them.diflufenican(organic chemistry) A carboxamide herbicide 2',4'-difluoro-2-(α,α,α-trifluoro-m-tolyloxy)nicotinanilidedigipurpurinA particular steroid glycoside.digitisationAlternative spelling of digitization.digitization(computing) The conversion of data or information from analog to digital or binary.digladiation(obsolete) Act of digladiating; violent dispute, or combat.dihexahedronA six-sided prism having three planes on the extremities.dihydrofuran(organic chemistry) A five-membered, unsaturated heterocycle having four carbon atoms, one oxygen atom and one double bond; any derivative of this compounddihydromorinA flavanonol and tyrosinase inhibitor found in plants of the family Moraceae and some others.dihydropyran(organic chemistry) The compound with chemical formula C₅H₈O, a cyclic ether used to protect alcohols in organic synthesis.diiodination(chemistry) The addition of two atoms of iodine to a compounddijudicationThe act of dijudicating; judgement.dilaceration(dentistry) An angular distortion affecting a tooth.dilapidationThe state of being dilapidated, reduced to decay, partially ruined.dillenialean(botany) Relating to plants of the tropical plant order Dillenialesdilucidation(obsolete) The act of making clear; clarification or explanation.dimerisationAlternative spelling of dimerization.dimerization(chemistry) Any chemical reaction in which two monomers react to form a dimer.dinarization(rare) The development of a supposed Dinaric race by intermixing.dinumeration(obsolete) enumerationdiprionidian(paleontology, of a graptolite) Having a polyparium with a row of cells on each side.disaffectionDiscontent; unrest.disanimationloss of animation; loss of vigor, courage, or zeal.disattentionLack of attention; failure to pay attention.disboscationDeforestation for the purpose of creating cleared arable land for farming.discarnationThe process of becoming, or state of being, discarnate; dissolution of the physical body.disceptation(archaic) Controversy; disputation; discussion.disclamationThe act of disclaiming or something disclaimed.disclination(medicine) extorsiondiscomedusan(zoology) A jellyfish of the subclass Discomedusae.disconnexion(chiefly British) Dated spelling of disconnection.disgradation(Scots law, obsolete) degradation; a stripping of titles and honoursdisgregationSeparation; scattering.disimpactionThe act of disimpacting.disinfectionTreatment with disinfectant materials in order to destroy harmful microorganisms.disinflation(economics) A decrease in the inflation rate.disinsection(air travel) The use of insecticide for pest control; disinsectization.disinsertionA tear (rupture) near the periphery of the retina.disocclusion(computer graphics) The situation where a previously occluded object becomes visible.disoperationA lack of engagement or interaction, and/or antagonism toward cohesion.disoxidation(chemistry, archaic) deoxidationdisoxydationObsolete form of disoxidation.dispensationThe act of dispensing or dealing out; distributiondisquisitionA methodical inquiry or investigation.dissentation(obsolete) dissension; disagreementdissertationA lengthy lecture on a subject; a treatise; a discourse; a sermon.dissociationThe act of dissociating or disuniting; a state of separation; disunion.distillationThe act of falling in drops, or the act of pouring out in drops.distintegrinMisspelling of disintegrin.distoclusionAn abnormal distal positioning of the lower jaw.distoversion(dentistry) distal malposition of a toothdistribucionObsolete spelling of distribution.distributionAn act of distributing or state of being distributed.distroglycanMisspelling of dystroglycan.disturbation(obsolete) disturbanceditriflation(chemistry) reaction to form a ditriflatedivaricationA divergence of opinion.divinisation(British spelling) Alternative spelling of divinization.divinizationThe act or process of making divine.docilizationThe process of making docile.doctrinarianA doctrinaire.doctrination(nonstandard) indoctrinationdodecahedron(geometry) A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and is one of the Platonic solids.dodecandrian(botany) Of or relating to the Dodecandria; having twelve stamens, or from twelve to nineteen.dolabralexin(organic chemistry) A group of diterpenoid phytoalexins found in maize derived from dolabradienedolichocolonAn abnormally long large intestine.dolomizationconversion into dolomitedomification(astrology) The division of the heavens into twelve astrological houses; or a particular system for such division.dorsiflexion(medicine) Flexion in the dorsal direction.dorsoflexionThe act of bending a limb backwardsdorsomorphin(organic chemistry) The compound 6-[4-(2-piperidin-1-ylethoxy)phenyl]-3-pyridin-4-ylpyrazolo[1,5-a]pyrimidine, which is a selective inhibitor of bone morphogenetic proteindosificationThe supply of a measured dose of ingredients or drugs.doublecortin(biochemistry) A microtubule-associated protein expressed by neuronal precursor cells and immature neurons in embryonic and adult cortical structures.downpression(Rastafari) oppressiondraftspersonA draftsman or draftswoman.duodecillion(rare, US, British, Australia, short scale) 10³⁹.dynamisationAlternative form of dynamization.dynamization(medicine) A hypothetical increase of medicinal effectiveness by dilution and trituration.dyspropterin(organic chemistry) A chemical intermediate in the body’s pathway for making tetrahydrobiopterin, a cofactor needed for producing neurotransmitters like dopamine and serotonin.dystrobrevin(biochemistry) Any of a class of proteins that bind to dystrophin in the costamere of skeletal muscle cellsdystroglycan(biochemistry) A glycoprotein associated with dystrophin.