English words: ultramicrobacterial to ultrastrenuous

300 English words, part 5 of 88 of the words starting with U, A to Z. 10 have a page of their own.

English words ultramicrobacterial to ultrastrenuous

ultramicrobacterial adjective: Relating to ultramicrobacteria.
ultramicrobacterium noun: A bacterium that is considerably smaller than typical bacterial cells and is 0.2 to 0.3 micrometers (200-300 nm) in diameter.
ultramicrobalance noun: A balance used to weigh very small amounts
ultramicrocentrifuge noun: Synonym of microultracentrifuge.
ultramicrochemical adjective: Relating to ultramicrochemistry.
ultramicrochemist noun: One who studies ultramicrochemistry.
ultramicrochemistry noun: ultramicroscale chemistry
ultramicrodetermination noun: microdetermination performed on a small scale.
ultramicroelectrode noun: A very small microelectrode
ultramicrofiche noun: A particularly compact microfiche, storing data at significantly higher densities.
ultramicrofluorimetric adjective: Relating to ultramicrofluorimetry
ultramicrofluorimetry noun: microfluorimetry by means of an ultramicroscope
ultramicrofluorometric adjective: Alternative form of ultramicrofluorimetric.
ultramicrograph noun: A photograph made using an ultramicroscope
ultramicrohardness noun: The microhardness of a very thin film.
ultramicroheterogeneous adjective: On a smaller scale than microheterogeneous.
ultramicrometer noun: A very precise micrometer.
ultramicroorganism noun: Any ultramicroscopic organism.
ultramicropathological adjective: Relating to ultramicropathology
ultramicrophotography noun: microphotography by means of an ultramicroscope
ultramicropore noun: A pore having dimensions of the order of a nanometre
ultramicroporous adjective: Having pores of a size considerably less than a nanometre
ultramicroscale adjective: On an ultramicroscopic scale.
ultramicroscope noun: a microscope that uses bright illumination against a black background to view small particles
ultramicroscopic adjective: Too small to be seen with an ordinary microscope.
ultramicroscopical adjective: ultramicroscopic
ultramicroscopically adverb: By means of, or in terms of, ultramicroscopy.
ultramicroscopy noun: The scientific use of the ultramicroscope.
ultramicrosize adjective: Smaller than microsize.
ultramicrospectrophotometer noun: A spectrophotometer equipped with an ultramicroscope
ultramicrostructural adjective: Relating to ultramicrostructure
ultramicrostructure noun: microstructure as revealed by an ultramicroscope
ultramicrotome noun, verb: A microtome that cuts extremely thin slices of tissue, especially for use in electron microscopy.
ultramicrotomic adjective: Relating to an ultramicrotome
ultramicrotomy noun: microtomy using an ultramicrotome
ultramilitant adjective: extremely militant
ultraminiature adjective: Extremely small; highly miniaturized.
ultraminiaturization noun: Reduction to ultraminiature size.
ultraminiaturize verb: To reduce to ultraminiature size.
ultraminiaturized adjective: Reduced to ultraminiature size.
ultraminimal adjective: Very minimal.
ultraminimalist adjective: Very minimalist
ultraminute adjective: extremely minute
ultramobile adjective: Remarkably mobile; very convenient to travel with.
ultramoderate adjective, noun: Of very moderate political views.
ultramodern adjective: Extremely modern.
ultramodernism noun: An ultramodern style.
ultramodernist noun: One who strongly believes in current views, who is extremely modern in ideas or style.
ultramodernistic adjective: extremely modernistic
ultramodernity noun: The property of being ultramodern.
ultramodest adjective: extremely modest
ultramodularity noun: The condition of being ultramodular
ultramoist adjective: Very moist.
ultramolecular adjective: So highly diluted as not to contain a single molecule of the active substance.
ultramontane adjective, noun: Promoting the supremacy of the Pope.
ultramontanism noun: A Roman Catholic philosophy that emphasises the prerogatives and powers of the Pope.
ultramontanist noun: A supporter of ultramontanism.
ultramorphologic adjective: Alternative form of ultramorphological.
ultramorphological adjective: Relating to ultramorphology
ultramorphology noun: The morphology of biological ultrastructures
ultramundane adjective: extraordinary; abnormal
ultramutated adjective: very mutated
ultramutation noun: A very high level of mutation
ultramylonite noun: A kind of mylonite defined by modal percentage of matrix grains more than 90%.
ultrananocrystalline adjective: Having crystals less than nanoscale
ultranarrow adjective: Extremely narrow.
ultranational adjective: ultranationalist
ultranationalism noun: Extreme nationalism, the belief in the superiority of one's nation and of the paramount importance of advancing it.
ultranationalist adjective, noun: Pertaining to or supporting ultranationalism; exceedingly nationalistic.
ultranationalistic adjective: Very radically nationalistic.
ultranationalistically adverb: In an ultranationalistic manner.
ultranatural adjective /ˈʌltɹəˈnætʃ.ə.ɹəl/: Extremely natural.
ultranerdy adjective: Exceptionally nerdy.
ultranervous adjective: Extremely nervous (on edge; anxious).
ultranice adjective: extremely nice
ultraniche adjective: Extremely niche.
ultraobscure adjective: extremely obscure
ultraofficious adjective: extremely officious
ultraoligotrophic adjective: Very oligotrophic
ultraoligotrophy noun: The condition of being ultraoligotrophic
ultraoptimistic adjective: extremely optimistic
ultraorthodox adjective: Very orthodox, chiefly among Jewish sects.
ultraorthodoxy noun: The quality of being ultraorthodox.
ultrapacifism noun: Alternative spelling of ultra-pacifism.
ultrapapist noun: A particularly devoted papist.
ultraparadoxical adjective: Relating to the third and final stage in Pavlov's theory of transmarginal inhibition, at which point negative stimulation results in positive responses and...
ultraparallel adjective: Sharing a common perpendicular.
ultraparanoid adjective: Highly paranoid or suspicious.
ultrapasteurization noun: A form of pasteurization in which the product is subjected to extreme heat for only a few seconds.
ultrapasteurized adjective: Having undergone ultrapasteurization.
ultrapatriotic adjective: Extremely patriotic.
ultrapatriotism noun: Extreme patriotism.
ultrapeer noun: In a peer-to-peer network, a peer capable of routing requests and responses from others rather than always adopting a direct client-server connection.
ultrapercussive adjective: Highly percussive.
ultraperfect adjective: Entirely perfect; exceptionally good.
ultraperformance adjective: Very high-performance.
ultraperipheral adjective: On the extreme periphery
ultrapermanent adjective: Of great permanence; very long-lasting.
ultrapersonal adjective: Extremely personal
ultrapersuasive adjective: extremely persuasive
ultraphone noun: A telephone capable of transmitting communications faster than the speed of light.
ultraphotomicrograph noun: A photomicrograph obtained via an ultramicroscope.
ultraphysical adjective: extremely physical.
ultraphytoplankton noun: Synonym of nanophytoplankton.
ultraphytoplanktonic adjective: Relating to or composed of ultraphytoplankton.
ultrapious adjective: Extremely pious, overly devout or reverent.
ultraplanetary adjective: Beyond the planets.
ultraplankton noun: nanoplankton and picoplankton considered as a group
ultraplinian adjective: More powerful than that of Vesuvius in AD 79 (witnessed by Pliny the younger)
ultrapolarized adjective: Exceptionally polarized.
ultrapolish verb: To polish a surface until it is ultrasmooth
ultrapolynomial adjective, noun: A power series in several variables P:Kᵈ→K (with K a field) of the form P(x)=Σ_(α∈ℕᵈ)c_αx^α whose coefficients are bounded in some specific sense.
ultrapoor adjective: Exceptionally poor; in a state of dire poverty.
ultrapop noun: A particularly pure or intense form of pop music.
ultrapopular adjective: Extremely popular.
ultraportable adjective, noun: Extremely portable
ultraposh adjective: extremely posh
ultrapotassic adjective: Having a very high potassium content.
ultrapotent adjective: Extremely potent, of utmost potency.
ultrapoverty noun: Extreme poverty.
ultrapower noun: The special case of an ultraproduct where all factors are equal.
ultrapowerful adjective /ˈʌltɹəˈpaʊɚfəl/: Extremely or exceedingly powerful; having, or capable of exerting great power, potency, or influence.
ultrapractical adjective: Extremely practical.
ultraprecise adjective: Extremely precise.
ultraprecisely adverb: With very great precision.
ultraprecision noun: Very high precision.
ultrapredictable adjective: Very predictable.
ultrapremium adjective: At the top end of premium; of the very highest quality.
ultraprestigious adjective: Very highly prestigious.
ultraprimitive adjective: Extremely primitive.
ultraprocessed adjective: Alternative spelling of ultra-processed.
ultraprocessed food noun: Alternative form of ultra-processed food.
ultraproduct noun: A quotient of the direct product of a family of structures
ultraprofessional adjective: extremely professional
ultraprofound adjective: extremely profound
ultraprogressive adjective, noun: Very progressive.
ultraprotective adjective: Extremely protective.
ultraproud adjective: extremely proud
ultraprudent adjective: extremely prudent
ultrapure adjective /ˈʌltɹəˈpjʊə/: Extremely pure; of supreme purity.
ultrapurification noun: The process, or the result of making something ultrapure
ultrapurified adjective: Made ultrapure
ultrapurism noun: An extreme form of purism
ultrapurity noun: The quality of being ultrapure.
ultraquantum adjective /ˌʌltɹəˈkwɑntəm/: Of a state in which only the lowest Landau level (orbit with a discrete energy value) is occupied.
ultraquick adjective: Extremely or exceedingly quick; of utmost quickness.
ultraquiet adjective: Extremely quiet.
ultrarace noun: A race which is longer than a marathon.
ultraracism noun: Extreme racism, the belief in the superiority of one's ethnic group or race
ultraracist adjective: Extremely racist.
ultraradical adjective, noun: Extremely radical, especially in politics.
ultraradicalism noun: Extremely politically radical beliefs and attitudes.
ultrarapid adjective: Extraordinarily rapid; of utmost rapidity.
ultrarapidly adverb: In an ultrarapid manner
ultrarare adjective: Extremely rare; of utmost rarity.
ultrararefied adjective: Very highly rarefied.
ultrarational adjective: Extremely rational.
ultrarationality noun: The quality of being ultrarational.
ultrareactionary adjective, noun: Very reactionary.
ultrareal adjective: Synonym of ultrarealistic.
ultrarealism noun: Any particular strong form of realism.
ultrarealist noun: A proponent of ultrarealism.
ultrarealistic adjective: Extremely realistic.
ultrared adjective, noun: infrared
ultrarefined adjective /ˌʌltɹəɹiːfaɪnd/: Extremely refined; sometimes, more refined than a specific purity cutoff for a particular substance.
ultrarefinement noun: The quality of being ultrarefined.
ultrarelativistic adjective: Moving at a speed very close to the speed of light.
ultrarelaxing adjective: extremely relaxing
ultrareliable adjective: Extremely reliable.
ultrareligious adjective: Extremely religious.
ultrarepublican adjective, noun: Having very strong republican beliefs.
ultrarepublicanism noun: Very strong republican beliefs.
ultraresilience noun: Extreme resilience
ultraresilient adjective: Very resilient; that exhibits ultraresilience
ultrarespectable adjective: extremely respectable
ultrarevolutionary adjective, noun: Being revolutionary beyond normal practices, intensely revolutionary.
ultrarevolutionism noun: Extremely revolutionary doctrines or actions.
ultrarevolutionist noun: Synonym of ultrarevolutionary.
ultrarich adjective, noun: Extremely rich; very wealthy.
ultraright adjective, noun: Extremely right-wing.
ultrarightism noun: ultraright beliefs generally
ultrarightist noun: A person of ultraright politics.
ultraripe adjective: Extremely ripe.
ultrarisky adjective: Extremely risky.
ultraritualistic adjective: extremely ritualistic
ultraromantic adjective: Extremely romantic.
ultraromanticism noun: An exaggerated or extreme form of romanticism.
ultraroyalism noun: The political beliefs of the ultraroyalists.
ultraroyalist noun: A member of a reactionary faction which sat in the French parliament from 1815 to 1830 under the Bourbon Restoration, favouring the monarchy and opposing...
ultrarun noun: An ultramarathon.
ultrarunner noun: A runner in an ultramarathon.
ultrarunning noun: The running of ultramarathons.
ultrasafe adjective: Extremely safe.
ultrasanguine adjective: Extremely sanguine.
ultrascaffold noun: A very large genetic scaffold
ultrascan noun, verb: An ultrasound scan.
ultrascholastic adjective: extremely scholastic
ultrascientific adjective: Extremely scientific.
ultrasculpture noun: very small sculpture
ultrasecret adjective: Extremely secret; of the utmost secrecy.
ultrasecure adjective: Extremely secure
ultrasecurity noun: Very high security.
ultrasedimentation noun: sedimentation by means of an ultracentrifuge
ultrasegregationist noun: A person who is strongly in favour of racial segregation.
ultraselect adjective: Extremely select (in any sense).
ultraselective adjective: Extremely selective
ultraselfish adjective: Extremely selfish.
ultrasensitive adjective: Extremely or excessively sensitive.
ultrasensitively adverb: In a ultrasensitive way.
ultrasensitivity noun: The quality of being ultrasensitive.
ultrasensual adjective: Extremely sensual.
ultrasentimental adjective: Highly sentimental.
ultrasequencing noun: an extension of pyrosequencing
ultraserious adjective: Extremely serious.
ultrasevere adjective: Extremely severe; of utmost severity.
ultrasexist adjective: Extremely sexist.
ultrasharp adjective: Extremely or excessively sharp; rapier.
ultrasheer adjective: Extremely sheer.
ultrashort adjective, noun: Very short.
ultrashortwave adjective: Having, or relating to, a very short wavelength.
ultrashrewd adjective: Extremely shrewd.
ultrasilent adjective /ˈʌltɹəˈsaɪlənt/: Exceptionally silent; of utmost silence.
ultrasimple adjective: Extremely simple.
ultrasimplified adjective: Simplified to a very great extent.
ultrasimplify verb: To simplify to a great extent.
ultraslick adjective: Extremely slick.
ultraslim adjective, noun: Extremely slim.
ultraslow adjective: Extremely slow; of utmost sluggishness.
ultrasmall adjective: Extremely or exceedingly small.
ultrasmart adjective: extremely smart.
ultrasmooth adjective: Very smooth
ultrasnug adjective: Very snug.
ultrasocial adjective: Very highly social.
ultrasoft adjective, noun: Extremely soft; of utmost softness.
ultrasolemn adjective: Extremely solemn.
ultrasonic adjective /ʌltɹəˈsɒnɪk/: Beyond (higher in frequency than) the range of sound perceptible to the human ear; with a frequency of 20 kilohertz or higher.
ultrasonic bath noun: A piece of industrial or laboratory equipment that consists of a container, or bath, used for cleaning, mixing, or homogenisation of objects or substances...
ultrasonically adverb: In an ultrasonic manner.
ultrasonicate verb: To subject to ultrasonication.
ultrasonication noun: sonication using ultrasound
ultrasonicator noun: A device for performing ultrasonication.
ultrasonics noun: the science and technology of ultrasound
ultrasonificate verb: To subject to ultrasonification
ultrasonificated adjective, verb: Subjected to ultrasonification
ultrasonification noun: ultrasonication
ultrasonocardiogram noun: An image produced by ultrasonocardiography.
ultrasonocardiographic adjective: Relating to ultrasonocardiography.
ultrasonocardiography noun: Cardiography using ultrasound.
ultrasonocardiotomogram noun: An image produced by ultrasonocardiotomography.
ultrasonocardiotomography noun: A medical imaging technique that uses ultrasound waves to produce cross-sectional (tomographic) images of the heart, allowing visualization of cardiac...
ultrasonoglottography noun: Glottography using ultrasound.
ultrasonogram noun: An image produced by ultrasonography.
ultrasonograph noun: An ultrasound image
ultrasonographer noun: A person who performs ultrasonography: a sonographic technician, an expert in ultrasonography, or both coinstantiated.
ultrasonographic adjective: Of, pertaining to, or produced by ultrasonography
ultrasonographical adjective: ultrasonographic
ultrasonographically adverb: By means of ultrasonography.
ultrasonographics noun: ultrasonographic examinations collectively
ultrasonographist noun: An ultrasonographer.
ultrasonography noun: Medical ultrasonography: The use of ultrasound to produce diagnostic images of the internal organs of the body, or of a foetus.
ultrasonohysterography noun: Synonym of sonohysterography.
ultrasonological adjective: Relating to ultrasound.
ultrasonologically adverb: In terms of, or by means of, ultrasound.
ultrasonologist noun: A person who performs ultrasound.
ultrasonology noun: The study of ultrasound and its applications
ultrasonometer noun: A device that uses ultrasound to image osteoporosis
ultrasonometric adjective: Relating to ultrasonometry.
ultrasonometry noun: Synonym of sonometry.
ultrasonophoresis noun: Synonym of sonophoresis.
ultrasonoscope noun: A device that displays an ultrasonographic image
ultrasonoscopic adjective: ultrasonographic
ultrasonoscopy noun: ultrasonography
ultrasonosurgery noun /ˌʌltɹəsɒnəʊˈsɜː(ɹ)dʒəɹi/: Surgery by means of focused ultrasound.
ultrasonotomogram noun: An image produced by ultrasonotomography.
ultrasonotomograph noun: A device that produces ultrasonotomograms.
ultrasonotomographic adjective: Relating to ultrasonotomography.
ultrasonotomography noun: Tomography using ultrasound.
ultrasophisticated adjective: extremely sophisticated
ultrasophistication noun: The quality of being ultrasophisticated.
ultrasound noun, verb /ʌl.tɹə.saʊnd/: Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz.
ultrasparse adjective: Extremely sparse.
ultrasparsifier noun: A form of sparsifier that makes a graph particularly sparse.
ultraspecialization noun: The quality of being ultraspecialized.
ultraspecialized adjective: extremely specialized
ultraspecific adjective: Relating to taxa at greater than species level
ultraspecificity noun: The condition of being ultraspecific
ultraspectral adjective: Describing extremely high-definition spectral imaging (beyond hyperspectral)
ultraspherical adjective: Related to or involving a Gegenbauer polynomial.
ultraspinning adjective: ultrafast spinning
ultraspiracle noun: An invertebrate nuclear receptor for juvenile hormones.
ultraspiritual adjective: extremely spiritual
ultraspiritualism noun: The quality of being ultraspiritual.
ultraspirituality noun: The quality of being ultraspiritual.
ultrastability noun: The condition of being ultrastable
ultrastable adjective: Very stable.
ultrastandardization noun: Extreme standardization.
ultrastatic adjective: static in a precisely defined way
ultrastellar adjective: Beyond the stars.
ultrasterile adjective: Extremely sterile
ultrastrenuous adjective: extremely strenuous

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0): each word's first meaning. A word with a page of its own links to it; for the rest, this line is PlainSpell's entry. Total under U: 26,317 words, in 88 parts.