Other Ending Letters

Word Lengths Starting With U

All 825 Matching Words

uberfan(informal) An extremely enthusiastic fan.uberisationNon-Oxford British standard spelling of Uberization.uberizationAlternative letter-case form of Uberization.ubermanAlternative spelling of überman.ubermenschenplural of ubermenschubication(archaic, chiefly in Spanish contexts) The condition or fact of being in, or occupying, a certain place or position; whereness, ubiety; also, a location.ubiquarianAlternative form of ubiquitarian.ubiquicidinA cationic, synthetic antimicrobial peptide that binds preferentially with the anionic microbial cell membrane at the site of infectionubiquilin(biochemistry) A protein that regulates protein degradationubiquinationMisspelling of ubiquitination.ubiquitarian(Christianity) Any of a group of Lutherans who held that the body of Christ was present everywhere at all times.ubiquitilationMisspelling of ubiquitylation.ubiquitin(biochemistry) Any of a class of small protein, or polypeptide, present in the cells of all eukaryotes, that play a part in modifying and degrading proteins.ubiquitination(biochemistry) The modification of a protein by the covalent attachment of one or more ubiquitin molecules.ubiquitinoylationubiquitinationubiquitinylationUbiquitination.ubiquitylation(biochemistry) ubiquitinationubistatin(medicine) Any of a class of compounds that inhibit proteasome-dependent degradation of proteins by binding the ubiquitin chain.uchronianPertaining to uchronia ("an idealized or fictional conception of a particular period of time, especially in the past").udonA Japanese wheat noodle.udoteacean(zoology) Any member of the algal family Udoteaceae.uglificationThe process of being made ugly or uglified.uhlan(historical) A lancer, a soldier armed with a lance in a former light cavalry unit of the Polish, Prussian or German, Austrian, and Russian armies.uitspan(South Africa) Alternative form of outspan.ukambinAn arrow-poison, extracted from plants of the family Apocynaceae, used by some African peoples; its action is similar to that of digitalis.ukelin(music) A musical instrument resembling a ukelele and violin.ulanAlternative form of uhlan.ulcerationThe development of an ulcer.ulcerogenAny ulcerogenic materialuliconAlternative form of eulachon.ulikonAlternative form of eulachon.ulinastatinA glycoprotein, either derived from urine or produced synthetically, that acts as a trypsin inhibitor and can be used to treat various medical conditions.ulmin(organic chemistry) A brown amorphous substance found in decaying vegetation.ulodendronAny of various trees known only as fossils from the Pennsylvanian period, and belonging to the genus Ulodendron.ulotrichaleanRelating to algae of the order Ulotrichales.ulotrichan(archaic) Of or pertaining to the Ulotrichi, a race or species of humans as classified by Jean-Baptiste Bory de Saint-Vincent.ulpanAn Israeli school where the Hebrew language is taught to new immigrants.ultilisationMisspelling of utilisation.ultimation(nonstandard) ultimatumultion(archaic) revengeultracainSynonym of articaine.ultracentenarianA person who is over a hundred years oldultracentrifugationCentrifugation in an ultracentrifuge.ultracleanExceptionally clean.ultracondensationextreme condensation, typically of mitochondriaultraconservation(genetics) Extreme conservation (of genes)ultracosmopolitanextremely cosmopolitanultracrepidarian(uncommon, derogatory) Giving or offering opinions on something beyond one's knowledge or expertise.ultradiafiltrationultrafiltration or diafiltration (used, more or less, synonymously)ultradianCyclical with a periodicity significantly shorter than 24 hours, that is, more frequent than circadian.ultradiscretization(mathematics) The transformation of a discrete system into an ultradiscrete oneultradistribution(mathematics) A continuous linear functional.ultrafidian(rare) Going beyond mere faithultrafiltrationFiltration through a semipermeable membrane that only allows small molecules through.ultrafractionationfractionation by means of an ultracentrifugeultrafunction(mathematics) A type of generalized non-Archimedean functionultragreen(informal) Of a very vivid green colour.ultrahumanHaving powers much greater than those of a normal human; superhumanultrahypofractionationAn extreme form of hypofractionationultrainfiltrationMisspelling of ultrafiltration.ultraleanEspecially lean; streamlined.ultralocalization(physics) The act of making, or of treating as ultralocalultramarathonA running race over a distance longer than 42.195 km (26 miles 385 yard), the length of a standard marathon.ultrametricizationThe process, or the result of ultrametricizingultramicrodeterminationmicrodetermination performed on a small scale.ultraminiaturizationReduction to ultraminiature size.ultramodernExtremely modern.ultramutation(biology) A very high level of mutationultrapasteurizationA form of pasteurization in which the product is subjected to extreme heat for only a few seconds.ultraphytoplanktonSynonym of nanophytoplankton.ultraplanktonnanoplankton and picoplankton considered as a groupultraplinian(of a volcanic eruption) More powerful than that of Vesuvius in AD 79 (witnessed by Pliny the younger)ultraprecisionVery high precision.ultrapurificationThe process, or the result of making something ultrapureultrarepublicanHaving very strong republican beliefs.ultrarunAn ultramarathon.ultrascanAn ultrasound scan.ultrasedimentationsedimentation by means of an ultracentrifugeultrasolemnExtremely solemn.ultrasonicationsonication using ultrasoundultrasonificationultrasonicationultrasophisticationThe quality of being ultrasophisticated.ultraspecializationThe quality of being ultraspecialized.ultrastandardizationExtreme standardization.ultrasuperovulationAn extreme level of ovulationultrathinExtremely thin; of utmost thinness.ultravillainsupervillainululationThe act of ululating; a long, loud, wavering cry or howl.ulvaleanAny green alga of the order UlvalesulvanAny of a class of sulfated polysaccharides found in the cell wall of the green alga Ulva pertusa.ulvophyceanAny green alga of the class UlvophyceaeumbelliferonAlternative form of umbelliferone.umbelliprenin(organic chemistry) The chromenone derivative 7-[(2E,6E)-3,7,11-trimethyldodeca-2,6,10-trienoxy]chromen-2-oneumbilicationA small, navel-shaped depression, or dimple, at the centre of a rounded body.umbration(uncommon) Adumbration; shadow or outline.umbrosianin(organic chemistry) A diterpenoid isolated from Rabdosia umbrosa.umfaan(South Africa, historical) A young boy hired to look after cattle or to perform errands, etc.umpanA cloud-shaped gong rung in a Zen monastery to announce mealtimes, etc.umpteen(informal, often slightly derogatory) Relatively large but unspecified in number.umptillion(slang, hyperbolic) An extremely large, unspecified number.umqanAn Aleut burial practice involving burial mounds typically located on the edge of bluffs.unabandonTo go back to; to undo one's abandonment of.unacclimationThe condition of being unacclimated, or unused to something.unacclimatizationThe condition of being unacclimatized, or unused to something.unaccumulationThe process of getting rid of something previously accumulated.unactionLack or absence of action; an act of no actionunadonA Japanese dish of grilled glazed eel fillets served on steamed white rice.unadoptionThe process of unadopting.unadornTo add a feature or embellishment that makes something uglier; uglify.unadulterationThe state of not being adulterated.unaffectionThe lack or absence of affection; affectionlessness.unaffiliationLack of affiliation; the condition of being unaffiliated.unaggressionLack of aggression.unakin(often followed by to) Not akin; not allied by nature; dissimilar.unalterationLack of alteration; the state of remaining unchanged.unambitionThe absence of ambition.unamericanAlternative form of un-American.unanimitarianOf or pertaining to unanimity.unanticipationLack of anticipation.unappreciationLack of appreciation; failure to appreciate; ingratitude.unapprehensionThe quality of being unapprehending; unawareness; ignorance.unarion(mathematics) An element in the bottom level of associative composition algebra, which is an element in a fieldunarisenNot having arisen.unassertionAbsence of assertion or of assertiveness.unassign(chiefly computing) To remove or undo the assignment of.unattentionLack of attentionunattractionThe quality of not being attracted to somebody or something.unaustralianAlternative form of un-Australian.unawokenNot having been awoken.unban(transitive) To lift a ban against.unbatten(transitive) To open (something previously battened down.unbeatennot having been thrashed or beatenunbegunThat had no beginning; always existent.unbeholdenNot beholden; not obliged or bound by duty or expectations.unbenignNot benign; malevolent.unbespokenpast participle of unbespeakunbewrittenNot bewritten.unbiddennot invited, requested or asked forunbittenThat has not been bitten.unblownNot having been blown (in various senses).unbohemianNot bohemian, or insufficiently bohemianunbornNot yet born; yet to come; future.unboundenpast participle of unbindunbrokenWhole, not divided into parts.unbrown(rare) Not brown.unburden(transitive) To free from burden, or relieve from trouble.unburn(intransitive) To undergo the process of burning in reverse.unburthenObsolete spelling of unburden.unbutton(ambitransitive) To open (something) by undoing its buttons.uncan(rare) To remove from a can.uncancellationThe act of uncancelling.uncapitalization(rare) The state of being (rendered), or the process of becoming (or rendering), uncapitalized.uncelebrationA memorial of something bad.uncertainNot certain; unsure.uncertificationThe process of uncertifying; revocation of a certificate.unchain(transitive) To remove chains from someone or something.unchristen(transitive) To render unchristian.unchristianNot of the Christian faith.unchurn(transitive) Hypothetically, to undo the churning of.uncircumcisionThe absence of a circumcision; not being circumcised.uncircumscriptionThe quality of being uncircumscript.uncircumspectionLack of circumspection.uncitizenA person to whom citizenship is denied, or from whom it is revoked.uncivilisationAlternative form of uncivilization.uncivilizationThe quality of not being civilized.unclassificationThe removal or reversion of a classification or classified status from something.uncleanDirty, soiled or foul.uncocoon(ambitransitive) To come or bring out of a cocoon.uncoffin(transitive, sometimes figurative) To remove from a coffin; to exhume.uncoin(transitive) To deprive (metallic money) of its status as legal tender.uncollegianNot collegian.uncommonRare; not readily found; unusual.uncommunicationAbsence of communication.uncompassionLack or absence of compassion; compassionlessness.uncompletionLack or absence of completionuncomprehensionAlternative form of incomprehension.uncompressionAct or process of uncompressing.unconcernLack of interest or care; indifference or apathy.unconcessionThe retraction of a prior concessionuncondemn(transitive, rare) To reverse the condemnation of; to condemn no longer.uncondescension(rare) Absence of condescension; an uncondescending manner.uncondition(transitive) To free from prior conditioning.unconnectionAbsence of connection; disconnection.unconstrain(transitive) To free from constraints.unconversion(religion) The state of being unconverted; impenitence.uncooperationLack of cooperation; failure to cooperate.uncoordinationA lack of coordinationuncorrelation(uncountable) The condition of being uncorrelateduncorruptionincorruptionuncravenNot craven; not cowardly.uncreationThe act of uncreating; annihilation.uncrownTo deprive of the monarchy or other authority or status.unctionAn ointment or salve.uncultivationAbsence of cultivation; failure to cultivate.uncurtain(transitive) To remove a curtain from; to reveal.undamn(transitive) To undo the damning of; to free from damnation.undarken(ambitransitive) To take away the darkness (from something).undeafen(transitive) To free from deafness; to restore hearing to.undean(transitive) To deprive of the office or dignity of a dean.undecagon(geometry) A polygon with eleven sides and eleven angles.undecahedron(geometry) A polyhedron with eleven faces.undecan(organic chemistry, in combination) undecane.undeceptionThe point of being undeceived or freed from a misconception.undecillion(US; modern British & Australian, short scale) 10³⁶.undeclaration(computing, programming) The act of undeclaring something previously declared.undecylprodigiosin(organic chemistry) The undecyl derivative of prodigiosinundefinitionThe act of undefining; removal or cancellation of a definition.undeificationThe process of undeifying.undeletion(computing) Restoration of previously deleted content.undemocratisationAlternative spelling of undemocratization.undemocratizationthe act or process of undemocratizingundemonization(rare) Synonym of dedemonization.undenutritionMisspelling of undernutrition.undepressionAbsence or reversal of a depressed stateunderaccelerationInsufficient acceleration.underaccommodation(sociolinguistics) Insufficient convergence; the situation where a speaker is underaccommodative.underacetylation(biochemistry) Insufficient acetylation (typically of histones)underactionInefficient action.underactivationinadequate activationunderactuationInsufficient actuationunderacylationA less than normal degree of acylationunderadduction(medicine) Hypoadduction.underallocationA less than normal, or insufficient, allocation.underambitionThe quality of being underambitious.underamplificationinsufficient amplificationunderannotationinsufficient annotationunderanticoagulationInsufficient anticoagulation (having received warfarin therapy for only a short time)underapplicationThe act of underapplying.underappreciationinsufficient appreciationunderapproximationAn approximation that is lower than the true value.underarticulationDeliberately leaving an utterance indistinct or unarticulated.underattentionInsufficient attention.underattenuationInsufficient attenuationunderbittenpast participle of underbiteunderburdenTo give too light a burden; to assign less than a fair share.underburn(transitive, obsolete) To burn up.undercalculationCalculation producing too small a result.undercapitalisationAlternative form of undercapitalization.undercapitalization(finance) Insufficient capitalizationundercaptainA subordinate captain.undercarboxylationThe quality of being undercarboxylated.underchamberlainA deputy chamberlain of the exchequer.underchieftainA subordinate chieftain.underchlorinationInsufficient chlorination (usually, of swimming pool water or drinking water).undercitationInsufficient citation.undercitizenA lower-ranking citizen.underclassman(US) A freshman or sophomore in a high school or college or equivalent.underclassmenplural of underclassmanunderclasspersonAn underclassman of any gender.underclasswomanA female underclassman.undercoachmanA subordinate coachman.undercollectionInsufficient collection, as:undercommunicationToo little communication.undercompensationInsufficient compensationunderconcernAn insufficient amount of concern.underconstrainTo apply insufficient constraints (to).underconsumption(economics) Insufficient consumption (for financial stability).undercontextualizationThe result or process of undercontextualizing.undercoordinationAn insufficient level of coordinationundercorrectionInsufficient correction.undercriminalizationThe fact or process of not criminalizing enough.underdeaconA subordinate deacon.underdefinitionThe act or process of underdefining; inadequate definition.underdetectionDetection at excessively low levels, or at levels lower than are actually the caseunderdeterminationThe state or quality of being underdeterminedunderdeviationA deviation from a target that results in less of something than was desired.underdilation(surgery) Less than normal dilationunderdilutionInsufficient dilution.underdiscriminationLess than normal discriminationunderdispersionInsufficient dispersionunderdistributionAn inadequate distribution (especially of money).underdiversificationInsufficient diversification.underdrainAn underground drain or trench with openings through which the water may percolate from the soil or ground above.underdrawnpast participle of underdrawunderdrivenpast participle of underdriveunderearn(transitive) To earn less than.undereducationThe state of being undereducated or the practice of undereducating.underenumerationInsufficient counting, particularly in the census.undereruption(dentistry) The state of being undererupted, with less of the tooth visible than is normal.underestimation(uncountable) The act of underestimating.underexcretion(biology) inadequate excretion of somethingunderexpansionInsufficient expansionunderexplainTo provide an insufficient explanationunderexploitationInsufficient exploitation.underexpressionInsufficient or abnormally low expressionunderextension(linguistics) Application of a term to too few referents, as for example when a child uses cat to refer only to the family pet.underextractionLess than the normal or optimum amount of extractionunderextrapolationinsufficient extrapolationunderfermentationinadequate fermentationunderfertilizationInadequate fertilization; the underuse of fertilizer.underfootmanA subordinate footman.underfriction(chiefly attributive) A system for preventing a rollercoaster train from jumping off the track while in violent motion, using additional wheels under the track.underfunction(intransitive) To function inadequately.undergainTo gain too much.undergeneralisationAlternative form of undergeneralization.undergeneralizationThe act, or an instance, of undergeneralizing.undergenerationThe generation of too little or too few of something; underproduction.underglycolysationMisspelling of underglycosylation.underglycosylationLess than normal glycosylation.undergownA gown worn under another, or under some other article of dress.undergrowninsufficiently grown; not having grown to a normal or suitable size.underguardianA subordinate guardian.underhangman(nonce word, Shakespeare) An assistant or deputy hangman.underhorsemanA subordinate horseman.underhydrationInadequate hydration.underhydroxylation(biochemistry) Insufficient hydroxylation (typically of collagen)underidentificationInsufficient identification.underimmunizationinadequate immunizationunderimmunosuppressioninadequate immunosuppressionunderinclusioninclusion of too few or too littleunderinflationInadequate inflation (of vehicle tyres, etc.).underinterpretationInadequate interpretation.underirrigationInadequate irrigation.underjoin(transitive) To join, add, or append (something) to the end of something else.underknownNot known widely enough; of inadequate fame.underlainpast participle of underlieunderlengthen(transitive) To lengthen too little.underlineationSynonym of underlining (“marking text with an underline”).underlinen(dated) Underwear (especially, but not always, made of linen); any undergarment.underlubricationinadequate lubricationundermaintain(transitive) To maintain inadequately; to allow to fall into disrepair.undermanA man who is subordinate to, inferior to, or in some way disadvantageously placed with respect to others.undermarginThe lower rim or margin of something.undermasculinizationThe quality of being undermasculinized.undermatronA lower-ranking matron.undermedication(medicine) Insufficient medicating; underuse of medication.undermetallationInsufficient metallationundermineralizationInsufficient mineralization.undermodificationInsufficient modification.undermodulationInsufficient modulation (typically of a radio signal)undermotivationinadequate motivation; the state of being undermotivatedundermountainBeneath a mountain.undermyelinationInsufficient myelinationundern(UK, dialectal) Synonym of afternoon.underneutralizationThe process of underneutralizing.undernotificationIncomplete notification (typically of deaths)undernutritionInadequate nutrition, either due to a lack of food, or to the inability of the body to absorb its nutrients.underobturation(dentistry) Insufficient obturation; an imperfect stopping up, or underfilling.underoccupationInsufficient occupation; the state of being occupied by too few.underoptimizationThe act or process of underoptimizing.underorganizationInsufficient organization.underoxygenation(of living tissues or of ecological environments) The state of being underoxygenated.underparameterizationInsufficient parameterizationunderparticipationInadequate participation.underpartition(transitive) To divide into too few partitions.underperfusioninadequate perfusionunderpersonA person of low status.underpersonalization(very rare) The act of underpersonalizing.underpigmentationInadequate pigmentation.underpin(transitive) To support from below with props or masonry.underplanTo plan insufficiently.underpopulationInsufficient population.underportionThe lower portion of something; the underneath.underprecisioninadequate precisionunderpredictionA prediction that is smaller than the true value.underprenylation(biochemistry) Insufficient prenylation / isoprenylationunderpreparationinsufficient preparationunderprescriptionPrescription of an inadequate amount of a drug.underpressurizationInadequate pressurization.underproductionThe production of an insufficient amount.underproliferationInsufficient proliferationunderpromotionInsufficient promotion (of goods, services, employees, etc.).underproportionThe quality of forming too small a proportion; insufficient representation within a group.underprotectioninadequate protectionunderprovisionInsufficient provision.underpunctuationInsufficient punctuation.underqualificationThe condition of being underqualified.underqueenAn inferior or subordinate queen.underquotationinsufficient quotationunderransimple past of underrununderreactionA reaction that is inadequate or insufficient.underreckon(transitive) To reckon below what is right or proper; to underrate.underrecognitionFailure to recognise (e.g. a disease from its symptoms) often enough.underrelaxation(mathematics) A technique useful for solving strongly nonlinear equations, similar to overrelaxation, except that the variable changes are slowed down rather than sped up.underreplication(genetics) Insufficient replicationunderrepresentationInsufficient or disproportionately low representation.underrestrainTo fail to restrain sufficiently.underresuscitation(medicine) The administration of an inadequate amount of fluid during an attempt to resuscitate somebody.underrotationinsufficient rotationunderrun(accounting) A condition in which fewer products are delivered or produced than had been ordered.undersacristanA subordinate sacristan.undersatisfactionThe quality of being undersatisfied.undersaturationThe state of an unsaturated solutionunderseamanA subordinate seaman.underseason(transitive) To season (flavour) insufficiently.undersectionA subsection that lies underneath.undersedationinadequate sedationunderseenToo little seen.undersegmentation(computing) A division into too few segments, as when attempting to recognize parts of an image.underselectionThe selection of something less often or by fewer people than would be expected.undersextonA subordinate sexton.undershapen(poetic, nonce word) Under the usual size; dwarfish; small.undersignTo subscribe; sign one's name at the foot of.undersimplification(mathematics) Incomplete simplificationunderskinThe layer of skin under the dermis, the subcutis or hypodermis.undersovereignA subordinate sovereign (ruler).underspecificationInadequate specification; failure to specify in enough detail.underspin(uncountable, sports) Backspin.underspokenpast participle of underspeakunderspun(textiles) Too lightly or loosely spun.understimulationinsufficient stimulationundersubscriptionThe subscription of significantly less than is available.undersulfationA less than normal degree of sulfationundertakenpast participle of undertakeundertrain(ambitransitive) To train less than required or normal.undertranslation(translation studies) The act or result of undertranslating.undertroddenSynonym of downtrodden (“oppressed, persecuted, subjugated”).undertubulation(medicine) Insufficient tubulation of long bones, resulting in diaphyseal or metaphyseal widening.underturn(transitive, obsolete) To turn upside down; subvert; upset.underutilisationAlternative form of underutilization.underutilizationThe state of being underutilizedundervaccinationinadequate vaccinationundervaluationThe act of undervaluing, of assigning too low a value to something.undervegetationVegetation lying underneath; underbrush.underventilation(medicine) insufficient breathingundervirilisationAlternative form of undervirilization.undervirilizationinadequate virilization occurring when a genetic male cannot produce enough androgen or the body tissues cannot respond to itunderwardenA subordinate warden.underween(transitive, rare or nonstandard) To undervalue.underworkmanAn inferior or subordinate labourer.underwrittenpast participle of underwriteundesignTo reverse or fail to implement a design; to design something in a way that deliberately rejects the conventions of designing.undeterminationArchaic form of indetermination.undevigintillion(rare) Synonym of novemdecillion.undevotionAbsence or lack of devotion.undifferentiationThe quality or state of being undifferentiated: absence of differentiation.undigestionLack of digestion, or poor digestion.undilutionThe quality of being undiluted.undisprovenNot disproven.undistortionThe removal of distortion from an image etc.undiversion(medicine) Restoration of the urinary tract to its normal state after a diversion.undomesticationThe reverse of domestication; the process of making something no longer domestic, or taking it out of the home.undonAlternative form of udon (“Japanese wheat noodle”).undrainTo restore that which has drained away.undrawnpast participle of undrawundrown(rare, transitive) To remove the water from (something drowned or flooded); to unflood.undrunkenNot drunken; sober, unintoxicated.undulationAn instance or act of undulating.undulin(biochemistry) An extracellular matrix glycoprotein, related to fibronectin, associated with collagen fibrilsunearn(transitive) No longer to deserve (privileges, respect, etc.) that one had previously earned.uneducationLack of education; ignorance.unegalitarianNot egalitarian.unelectionThe instance of being not elected.unencapsulationThe process of unencapsulating.unengraven(obsolete) Not engraved.unepicureanNot epicurean.unequalizationThe process of unequalizing.unequestrianNot equestrian.unevenOf a surface, not even; covered with raised spots, pits and grooves.unexecution(computing) The undoing of a command or operation previously executed.unexpectation(obsolete) Absence of expectation; want of foresight.unexploitationLack of exploitation.unfain(archaic) Not fain; sorrowful; sorry.unfallenNot having fallen; that has not experienced or suffered a fall.unfashion(transitive) To undo the fashioning of; to take apart, or unmake.unfasten(transitive) To detach from any connecting agency or link; to disconnect.unfitten(obsolete) Unfitted; unsuited.unflatten(transitive) To restore (something flattened) to its previous form.unforbiddenNot forbidden; permitted.unforeign(uncommon) Not foreign.unforeknownNot known in advance.unforgottenNot forgotten; still remembered.unformation(rare) The reverse of formation; taking or coming apart; disassembly.unforseenMisspelling of unforeseen.unfreeman(historical) Synonym of unfree.unfrighten(transitive) To make a person no longer frightened.ungain(obsolete or UK, dialect) ungainly; clumsy or awkwardungentlemanA man who lacks the refinement of a gentleman; a ruffian.ungladden(transitive, nonce word) To take the gladness from.ungnawn(archaic) Ungnawed.ungottenNot got or gotten; not acquired.ungownTo strip of a gown; to unfrock.ungreen(uncommon) Not green.ungrownNot grown; immature.unhappen(intransitive) To cease to have happened; to undo itself.unharden(transitive) To soften.unhiddensimple past and past participle of unhideunholpen(obsolete) Not helped.unhousebrokenNot housebroken.unhumanNot resembling or having the qualities of a human being.unhumanitarianNot humanitarian.unichain(probability theory) Of a Markov chain, consisting of a single recurrent class plus a possibly empty set of transient states.unicodification(computing, informal) Conversion to a format, platform, etc. compatible with Unicode.unicorn(biblical) In various Bible translations, used to render the Latin unicornis or rhinoceros (representing Hebrew רְאֵם): a reem or wild ox.unidirectionThe property of being unidirectional.unificationThe act or process of unifying.uniformalizationThe act or process of making things uniform.uniformisationAlternative spelling of uniformization.uniformitarianOne who accepts uniformitarianism, or the uniformitarian doctrine.uniformizationThe act of uniformizing.unijunction(electronics) (often attributive) A transistor that has a single junction.unilateralizationThe act of making something unilateral.unilluminationAbsence of illumination.unimpression(rare) A lack of impression; the state of being unimpressed.unimprison(transitive) To release from prison; to free.unincorporation(US) The state of being unincorporated, i.e. not contained in a municipality.unindentationSynonym of dedentation (“reversal of indentation”).uninformationUnwanted, useless, needless, or untrue information; misinformationuninhibitionThe quality of being uninhibited.uninitializationSynonym of deinitialization.uninitiationThe quality of being uninitiated.uninstallation(software) The process of removing a program from a computer.uninstantiation(programming) The process of uninstantiating; destruction of an instance.unintegrationThe quality of being unintegrated; lack of integration.uninterruptionAbsence of interruption; uninterruptedness.uninterwovenNot interwoven.uninventionThe process of uninventing.uninversion(linguistics) A kind of error where an utterance has not undergone the proper inversion, as in "*What she is eating?" for "What is she eating?".uninvitationThe withdrawal of an invitation.union(countable) The act of uniting or joining two or more things into one.unionisation(British spelling) Alternative spelling of unionization.unionization(politics) The act of forming a labor union.unipartisan(politics) relating to, or supported by one group, especially by one political partyuniquification(computing) The act of uniquifying.uniramian(zoology) Any member of the Uniramia, a group of arthropods.uniron(dated) To unshackle (remove irons from)unisectarian(rare) Composed of one sect.unisexualizationThe act or process of unisexualizing.unison(music, acoustics) A sound or note having the same pitch as another, especially when used as the base note for an interval; a unison string.unitarianEspousing a unitary view of somethingunitarisationAlternative form of unitarization.unitarizationThe act of unitarizing or of being unitarizedunitation(mathematics, archaic) The process of unitating.unition(obsolete) Union; the act of uniting, or the state of being united.unitisationAlternative form of unitization.unitizationProcess of unitizing.univerbation(linguistics) The diachronic process of forming a new single word from a fixed expression of several words.universalisation(British spelling) Alternative spelling of universalization.universalizationThe act or process of universalizing.universitarian(formal) Belonging or relating to, or found or gained in, a university.univocation(obsolete) Agreement of name and meaning.univoltinDated form of univoltine.unjoin(transitive) To separate or detach (things that were joined).unkeenNot keen, lacking in enthusiasm or motivation.unkenOnly used in unken reflex.unknowenObsolete form of unknown.unknown(sometimes postpositive) Not known; unidentified; not well known.unladenNot carrying anything; unburdened.unlearn(transitive) To discard the knowledge of.unlibertarianNot libertarian.unliken(transitive) To make unlike or describe as being unlike.unlisten(computing, dated) To cease to listen for incoming signals.unlitten(archaic) unlitunloosenTo unloose; to loosen.unmaiden(obsolete, transitive) To take the maidenhood (virginity) of; to deflower.unmammalianNot mammalian.unman(transitive, archaic) To divest of humanity.unmean(rare) Not mean (all senses).unmention(transitive) To not mention or fail to mention.unmethylation(biochemistry) The removal of methyl groups from a previously methylated moleculeunmetropolitanNot metropolitan.unmistakenNot mistaken; valid or accurate.unmodernizationDemodernization.unmotivationAn absence or lack of motivation.unmownNot mown; unmowed.unnun(transitive, rare) To remove from the condition of being a nun.unoften(literary except India) Not often; rarely, seldom.unopen(rare) Not open; closed.unorigination(theology) The property of not having originated, but having always existed.unorn(obsolete) Old; worn out; feeble.unostentationLack of ostentation.unoutgrownNot having been outgrown.unoutspokenNot outspoken.unoverriddennot overriddenunovertakenNot overtaken.unoverthrownNot overthrown.unpartakenNot partaken of.unpartisanNot partisan; impartial and unbiased.unpartition(computing, transitive) To remove the partitions from (a disk drive, a database, etc.).unpartizanAlternative form of unpartisan.unpassionLack of passion; impassivity.unpatricianNot patrician.unpawn(transitive) To redeem (goods previously pawned).unpen(transitive) To release (from a pen).unperfection(obsolete or nonstandard) Want of perfection; imperfection.unpersonA person who has been stripped of rights, identity, or humanity.unpersuasionThe state of not being persuaded; disbelief or doubt.unpin(transitive) To unfasten by removing a pin.unpinion(transitive) To release (something) from pinions.unplain(uncommon) Not plain.unplan(transitive) To undo the planning of (something previously planned); to cancel.unpoisonTo remove or expel poison from.unpostmodernNot postmodern.unpremeditationLack of premeditation; spontaneity.unpremultiplication(computer graphics) The process of unpremultiplying.unpreparationunpreparednessunprison(archaic, transitive) To liberate from prison.unproductionLack or absence of productionunprofessionalisationAlternative spelling of unprofessionalization.unprofessionalizationthe process of making something unprofessionalunprotectionRemoval of protection from something; act of unprotecting.unprovision(transitive, computing) Synonym of deprovision.unpublicationThe process of unpublishing something.unqualificationAbsence of qualification; the condition of not being qualified.unqueen(transitive) To divest of the rank or authority of queen.unreasonLack of reason or rationality; unreasonableness; irrationality.unreciprocationAbsence of reciprocation.unrecognitionLack of recognition; failure to recognize.unreconciliationThe state of not being reconciled; lack of reconciliation.unredden(transitive) To cause to stop being red.unreformation(obsolete) Lack of reformation; state of being unreformed.unregeneration(archaic) unregeneracyunregistrationThe process of unregistering.unrein(transitive) To loosen the reins of.unrelationLack or absence of relationunreligionThe antithesis or contradiction of (true) religion.unrenownLack of fame or renown; obscurity.unrepublicanNot republican; contrary to the spirit of a republicunreservation(chiefly computing) The undoing or cancellation of a reservation.unresignTo withdraw a resignation.unrestrain(transitive) To free from restraints.unribbon(transitive) To remove a ribbon fromunruin(transitive) To fix or restore something that was previously ruined; to bring back to a whole or functioning state.unrunNot having been run.unsacramentarianNot sacramentarian.unsadden(transitive) To relieve from sadness; to cheer up.unsanctificationAbsence or lack of sanctification.unsanitationLack of sanitation.unsatisfactiondissatisfactionunsaturation(chemistry) The degree or condition of being unsaturated.unscreen(transitive, sometimes figurative) To reveal by removing a screen.unseason(transitive, obsolete) To make unseasoned; to deprive of seasoning.unsectarianNot sectarian.unseenNot seen or discovered; invisible.unselectionThe process, act or instance of unselecting.unseparation(rare) The condition of not being separate; togetherness; combination.unserializationdeserializationunsewnpast participle of unsewunshadowban(Internet, transitive) To remove a shadowban against.unshapenShapeless; misshapen; deformed; ugly.unsharpen(transitive) To render unsharp; to spoil the sharpness of (something).unshavenNot having shaved; not shaven; untrimmed.unshewnObsolete spelling of unshown.unshodden(obsolete) Not wearing shoes; unshod.unshorten(rare, transitive, chiefly computing) To expand from an abbreviated form; to restore to its original length.unsicken(ambitransitive) To make or become less sick.unsign(transitive, intransitive) To remove one's signature from (something one has signed).unsin(transitive) To undo or annul a past sin.unskeinTo unwind from a skeinunslainNot slain; not killed.unsmittenNot having been smitten.unsoddenNot sodden; not saturated with moisture or weighed down by excessive wetness.unsophisticationAbsence of sophistication; the quality of being unsophisticated.unsovereignNot sovereign.unspin(transitive) To unravel (something spun, knit, or woven).unspoken(sometimes postpositive) Not spoken; not said.unstan(slang, transitive, intransitive) To stop acting as a stan (for); to cease to be an obsessive fan (of).unstentorianNot stentorian.unstiffenTo remove the stiffness from; to relax; to make pliant.unstolenNot having been stolen.unstraighten(transitive) To rearrange or reposition something so that it is no longer straight.unstrain(transitive) To relieve from strain; to relax.unstrewnNot having been strewn.unsubjectionLack of subjection; the condition of not being subject to something.unsubmissionAbsence of submission; unsubmissiveness.unsubscriptionThe act of unsubscribing.unsubstantiationThe quality of being unsubstantiated.unsuction(ambitransitive, rare) To remove suction, such as when suction cups become detached.unsuddenHappening slowly and with plenty of warning; not sudden.unsummon(transitive, fantasy) To send (a summoned creature) back to its own plane of existence.unsuspensionThe act of unsuspending something.unsuspicionLack of suspicion.unsweeten(transitive) To remove or lower the sweetness of.unsworn(chiefly law) Not swornunsynchronizationThe disruption of synchronizationuntabification(computing) The process of untabifying.untermenschenplural of untermenschunthicken(transitive) To make less thick.untighten(transitive) To loosen; to make something less tight.untin(transitive) To remove the tin (metal) from.untractarianNot Tractarian.untrainTo reverse or undo one's training; to become less trained than beforeuntrinitarianNot Trinitarian.untroddenThat has never been trod upon; unexplored, unspoiled.unturnTo turn in a reverse way, especially so as to open something.unvegetarianNot vegetarian.unvirgin(rare, transitive) To take the virginity of.unvitationA notification that someone is expressly not invited to an event or group.unwashenObsolete form of unwashed.unwesternNot western (culturally speaking).unwithdrawnNot withdrawn.unwokenNot having been woken.unwoman(transitive) To deprive of feminine qualities, or of the status of womanhood; to unsex.unwoodenNot made of wood; not wooden.unwornNot having been worn, as clothing.unwroken(obsolete) Unavenged.upbounden(obsolete) bound upupbrighten(ambitransitive, poetic) To make or become brighter.upcanyonCloser to the top of a canyonupconversion(electronics) Conversion of a lower radio frequency to a higher frequency, possibly using a mixer.updation(chiefly India, uncountable) The act or process of updating.upexpression(genetics, biochemistry) The greater than normal expression of a protein.upeygan(zoology) A borele or two-horned black rhinoceros (Diceros bicornis).upgradation(computing, nonstandard, proscribed, chiefly India) Upgrade; upgrading.upgunAlternative form of up-gun.uplean(ambitransitive, literary) To lean or incline upward; to cause (something) to lean upward.upman(American football) A player of the return team at kickoffupmodulationmodulation to a higher levelupmountainHigher up a mountain.uponA higher-register or more formal alternative to on in most, though not all, prepositional uses.upperclassman(US, education) A junior or senior student in a school or college.upperclassmenplural of upperclassmanupperclasspersonAn upperclassman of any gender.upperclasswoman(US) A female upperclassman.upransimple past of uprunupregulation(genetics) The process, in the regulation of gene expression, in which the number, or activity of receptors increases in order to increase sensitivity.uprun(transitive) To run up; ascend.upscanAn upward scan.upsection(geology) Towards the higher part of a section.upsertion(databases, rare) The act of upserting.upsherinIn some Jewish cultures, a ceremony for a three-year-old boy's first haircut, or the haircut itself.upsidedownAlternative spelling of upside down.upsidownObsolete form of upside down.upsilonThe twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.upstrain(poetic) To strain upward.uptitration(medicine) The gradual increase of a dose accompanied by observation of effects, usually and especially to arrive at an optimal dose.uptown(US) The commercial center of town (in Charlotte, North Carolina).uptrain(transitive) To train up; educate.upturnAn upward turn or trend, especially in business activity or profit.uracilation(organic chemistry) reaction with uraciluralitisationAlternative form of uralitization.uralitization(geology) The change of pyroxene to amphibole by paramorphism.uranian(mineralogy) Containing hexavalent uranium.uranin(chemistry) An alkaline salt of fluorescein, used as a brownish-red dye.uranoan(mineralogy) Containing tetravalent uranium.uranylian(mineralogy) Containing uranyl cations.urbanLiving in a city or town.urbanisationAlternative spelling of urbanization.urbanizationThe process of the formation and growth of cities.urbilatarianMisspelling of urbilaterian.urbilaterian(biology) The hypothetical last common ancestor to all bilaterians.urceolarianAny member of the Urceolaria.urchinA mischievous child.urchonObsolete form of urchin.urdamycin(organic chemistry) Any of a group of angucycline antibiotics present in Streptomyces fradiae.urechidanRelating to urechidsurechitin(obsolete, organic chemistry) A glucoside extracted from the leaves of a plant, Pentalinon luteum, found in the Caribbeanurechitoxin(organic chemistry) A poisonous glucoside found accompanying urechitin.ureidopenicillin(medicine) Any of a class of penicillin antibiotics in which an amino group has been replaced by a urea moiety.urethanAlternative form of urethane.urethanizationThe process of urethanizing.urezinA particular steroid glycoside.urgininA particular steroid glycoside.urheenAlternative form of erhu (“Chinese musical instrument”).uridylation(biochemistry) The addition of one or more uridine moieties.uridylylation(biochemistry) reaction with uridylic acidurinastatinAlternative form of ulinastatin.urinationThe process of passing urine, that is, of eliminating liquid waste from the body.urinterpretation(philosophy) An intentionalist form of interpretation that seeks to capture the author's intention but not necessarily the author's possibly flawed understanding.urmanSynonym of taiga (a kind of subarctic forest)urmetazoanThe hypothetical common ancestor of all animalsurnA vase with a footed base.urobilin(biochemistry) A yellow linear tetrapyrrole resulting from the breakdown of heme, produced when urobilinogen is oxidized by intestinal bacteria.urobilinogen(biochemistry) A colourless product of bilirubin reduction, formed in the intestines by bacterial actionurocortin(biochemistry) A potent anorexigenic peptide of 40 amino acids.urocyaninA blue pigment sometimes observed in the urine in certain diseases, especially scarlet fever.urodelan(zoology) Any member of the order Urodela (syn. of Caudata); a salamander.urodelian(zoology) Of or pertaining to the salamanders of Urodela (synonym of Caudata).urodilatin(biochemistry) A hormone that causes diuresis through increasing renal blood flow.uroerythrin(biochemistry) A red pigment (chromophore) associated with the brickdust deposit.urofollitropinA purified form of follicle-stimulating hormone from the urine of postmenopausal women, important in the development of follicles by the ovaries.urofuscohaematinAlternative form of urofuscohematin.urofuscohematinA red pigment derived from hematin, occurring in the urine.uroglaucin(obsolete, organic chemistry) A substance, apparently the same as indigo, occasionally found in the urine in degeneration of the kidneys. It is readily formed by oxidation or decomposition of indican.urografinAny of a family of contrast media containing derivatives of diatrizoic aciduroguanylinA peptide secreted by enterochromaffin cells in the duodenum and proximal small intestine. It acts as an agonist of the guanylyl cyclase receptor GC-C, and regulates electrolyte and water transport in intestinal and renal epithelia.urohaematinAlternative form of urohematin.urohaematoporphyrinAlternative form of urohematoporphyrin.urolithin(biochemistry) Any of a group of metabolites produced by human colon microflora from ellagic acid and related compoundsuromodulin(biochemistry) Tamm-Horsfall proteinuropathogenAny pathogen of the urinary tracturoplakin(biochemistry) Any of a particular family of transmembrane proteinsuroplasminogen(biochemistry) urokinase when active against plasminogenuroporphyrin(biochemistry) Any of a group of porphyrins excreted in the urine in some cases of porphyria.uroporphyrinogen(biochemistry) Any of a class of tetrapyrroles with four propionic acid groups and four acetic acid groups, involved in the synthesis of porphyrin.uroprotectionprotection of the urinary tracturoroseinSynonym of urrhodin.urospectrinA pigment found in the urine, possibly the same as urohematoporphyrin.urosteon(archaic, anatomy) A median ossification at the back of the lophosteon in the sternum of some birds.urotensinAny of a group of peptide ligands (tensins) secreted by the uroneurapophysa of some goby fishurotoxin(biochemistry) any toxic substance that can be found in urineurotropin(organic chemistry) hexamineuroxanthin(obsolete) The yellow pigment in urine.urreligionThe theoretical primeval religion.urrhodin(organic chemistry) Indigo red, a product of the decomposition or oxidation of indican, sometimes found in the sediment of pathological urines.ursin(organic chemistry) arbutinursonA species of New World porcupine, Erethizon dorsatum.urticalean(botany) Relating to plants of the former order Urticalesurtication(pathology) The development of urticaria (hives).urvan(Zoroastrianism) The soul.uscharidinA particular steroid glycoside.uscharinA particular steroid glycoside.usherian(rare) Relating to an usher.usherin(biochemistry) A protein encoded in humans by the gene USH2A, mutations in which are associated with Usher syndrome.usonianAlternative letter-case form of Usonian.ustiloxinAny of a group of cyclic peptides present in fungi of the genus Ustilaginoidea.ustion(obsolete) The act of burning, or the state of being burned.ustulationAn act of burning, especially roasting.usucapionThe acquisition of right or title to an object by means of the passage of time. The common law analogue is adverse possession.usucaptionThe acquisition of right or title to an object or property by means of the simple passage of time.usufruction(law) The condition or state of possessing a usufruct.usurpationThe wrongful seizure of something by force, especially of sovereignty or other authority.uterocalin(biochemistry) A lipocalin secreted by the endometriumuteroferrin(biochemistry) A glycoprotein, containing two atoms of iron, that is a major secretory product of a pig's uterus under the influence of progesterone.uterogestationGestation in the womb from conception to birth; pregnancy.uteroglobinA particular secretoglobin protein.uteroovarian(anatomy) Relating to the uterus and ovary.uterotoninA uterotonic substance present in the amniotic fluid during labourutilisationThe act of using something.utilitarianOf or relating to utility.utilitarianizationThe process of making something utilitarian.utilityman(baseball) A player who can play in several different positionsutilizationUS, Canada, and Oxford British English standard spelling of utilisation.utilon(economics) A hypothetical unit measuring satisfaction.utopianOf or pertaining to or resembling a utopia.utopianizationThe process of utopianizing.utrophin(biochemistry) A cytoskeleton protein homologous with dystrophinuttanasanAlternative form of uttanasana.uttroninA particular steroid glycoside.uvaricinA bis(tetrahydrofuranoid) fatty acid lactone, the first acetogenin discovered.uvedalin(organic chemistry) A particular melampolide found in Polymnia uvedalia.uvomorulin(biochemistry) The protein cadherin-1.uzarigeninA particular cardenolide.uzarin(organic chemistry) A particular cardenolide glycoside.uzaronThe dried alcoholic extract of the uzara root.