English words: orthoptic circle to oscillationlike

300 English words, part 40 of 67 of the words starting with O, A to Z. 17 have a page of their own.

English words orthoptic circle to oscillationlike

orthoptic circle noun /ɔːˌθɒp.tɪk ˈsɜː.kəl/: Synonym of director circle.
orthoptics noun: The study and treatment of muscular irregularities of the eye.
orthoptist noun: One who practices orthoptics (muscular irregularities of the eye).
orthopyroxene noun /ˌɔːθə(ʊ)paɪˈɹɒksiːn/: Any pyroxene that forms orthorhombic crystals.
orthopyroxenite noun: An ultramafic and ultrabasic rock normally composed of the mineral orthopyroxene
orthoquarkonium noun: A form of quarkonium where the spins of the constituent quarks are parallel.
orthoquartzite noun /ˌɔːθəʊˈkwɔːtˌsaɪt/: A very pure quartz sandstone composed of usually well rounded quartz grains cemented by silica.
orthoquartzitic adjective: Of or relating to orthoquartzite.
orthoquinone noun: 1,2-benzoquinone
orthoradial adjective: Relative to a grid of circles surrounding a point and lines starting at that point; such a graph has alternate circular and radial components
orthoradially adverb: In an orthoradial manner.
orthorectification noun: The processing of an aerial photograph by orthorectifying it.
orthorectified adjective, verb: Having been geometrically corrected so that distances shown are uniform and can be measured like a map.
orthorectify verb: To process an aerial photograph so as to geometrically correct it such that the scale of the photograph is uniform and it can be measured as a map is.
orthoreoviral adjective: Relating to the orthoreoviruses
orthoreovirus noun: Any virus of the genus Orthoreovirus that infect vertebrates, normally without causing disease
orthoretroviral adjective: Relating to orthoretroviruses
orthoretrovirus noun: Any retrovirus of the subfamily Orthoretrovirinae.
orthorexia noun: A fixation with healthy or righteous eating.
orthorexia nervosa noun: A fixation on righteous eating.
orthorexic adjective, noun: Having a fixation with healthy or righteous eating
orthorhombic adjective /ɔː(ɹ)θəˈɹɒmbɪk/: Having three unequal axes at right angles.
orthorhombic pyroxene noun: Any of a group of minerals having the general formula XYSi₂O₆ in which X is iron or magnesium and Y is iron or manganese.
orthorhombical adjective: Alternative form of orthorhombic.
orthorhombically adverb: In an orthorhombic manner
orthorhombicity noun: The condition of being orthorhombic
orthoroentgenogram noun: A radiograph produced by orthoroentgenography.
orthoroentgenography noun: orthopedic roentgenography
orthorrhaphan noun: Any fly of the infraorder Orthorrhapha
orthorrhaphous adjective: Relating to the orthorrhaphans
orthorubulavirus noun: Any virus of the genus Orthorubulavirus.
orthoscope noun: An instrument for examining the interior of an eye.
orthoscopic adjective: free from optical distortion
orthoscopy noun: Examination of the eye by means of the orthoscope.
orthoselection noun: The hypothesis that posits that orthogenesis works by means of natural selection.
orthoselective adjective: regioselective of the ortho- position in a benzene ring
orthoserpierite noun: An orthorhombic-pyramidal pale blue green mineral containing calcium, copper, hydrogen, oxygen, sulfur, and zinc.
orthosexual adjective /ˌɔː(ɹ)θəˈsɛksjuəl/: Relating to or having the orthodox form of sexuality in a particular culture.
orthosexuality noun: The orthodox or socially accepted form of sexuality or sexual expression in a particular culture.
orthosia noun: Any moth of the genus Orthosia
Orthosian adjective /ɔːrˈθoʊʒiən/: Of or relating to the god Orthosia in Greek mythology.
orthosilicate noun: Any salt or ester of orthosilicic acid, (M⁺)₄SiO₄⁴⁻ or Si(OR)₄.
orthosilicic adjective: Of, relating to or derived from orthosilicic acid.
orthosilicic acid noun: The hypothetical compound Si(OH)₄; it is only known as the orthosilicate salts or esters.
orthosiphon noun /ˌoɹ.θoʊˈsaɪ.fən/: Any herbaceous shrub of the genus Orthosiphon.
orthosis noun: A type of brace which either prevents or assists movement of a limb or the spine.
orthoslice noun: A slice that is orthogonal to a particular plane
orthosocial adjective: Not parasocial; reciprocated (of an interpersonal relationship).
orthosomatic adjective: Having a straight body
orthosomnia noun: An unhealthy obsession with achieving the correct amount and type of sleep.
orthosomycin noun: Any of a group of antibiotics that have orthoester linkages with a carbohydrate.
orthospermous adjective: Having the seeds straight, as in the fruits of some umbelliferous plants.
orthosporin noun: The isochromenone 6,8-dihydroxy-3-[(2S)-2-hydroxypropyl]isochromen-1-one present in some fungi
orthostasis noun: The act or status of standing upright.
orthostat noun /ˈoɹ.θəˌstæt/: An upright stone or slab, especially one which is part of a larger structure.
orthostate noun: Alternative form of orthostat.
orthostates noun: Synonym of orthostat
orthostatic adjective: Relating to orthostasis or orthostatism.
orthostatic hypotension noun: A form of hypotension that occurs when standing after a period of sitting or lying down.
orthostatism noun: Synonym of orthostasis (“an upright standing position”).
orthostereoscopic adjective: That produces a three-dimensional image free from distortion
orthostereoscopy noun: The production of a three-dimensional image free from distortion
orthosteric adjective: Describing the primary, unmodulated binding site (on a receptor) of a ligand
orthosterically adverb: In an orthosteric manner
orthosterism noun: The condition of being orthosteric
orthostichous adjective: Having orthostichies.
orthostichy noun: A row of leaves along a stem
orthostrophic adjective: Having coils wrapped around an erect cone.
orthostrophy noun: The condition of being orthostrophic.
orthostyle noun: A straight line of columns.
orthosubstituted adjective: Having undergone orthosubstitution.
orthosubstitution noun: Any substitution reaction that introduces an atom or group into the ortho- position
orthosurgeon noun: An orthopedist or orthopedic surgeon.
orthosurgery noun: Orthopedics or orthopedic surgery.
orthosymmetric adjective: That has equal elements of the secondary diagonal.
orthosymmetrical adjective: orthosymmetric
orthosympathetic adjective: Of or pertaining to the sympathetic component of the autonomic nervous system
orthosymplectic adjective: orthogonal and symplectic
orthotactic adjective: Relating to orthotactics.
orthotactically adverb: In terms of orthotactics.
orthotactics noun: The restrictions a language applies to the positions and patterns of graphemes in written words.
orthotaxon noun: A true taxon that is based on biological relationships rather than on form.
orthotectonic adjective: Produced by an orthogeosyncline
orthoteliine noun: Any moth of the subfamily Orthoteliinae
orthotellurate noun: The anion TeO₆⁶⁻; any salt containing this anion
orthoteny noun: The study of straight lines, especially in regards to the flight paths that UFOs tend to follow.
orthotetrahedral adjective: Relating to, or having the form of, an orthotetrahedron.
orthotetrahedron noun: A tetrahedron with three pairs of faces at right angles to one another.
orthothecid noun: Any hyolith of the order †Orthothecida
orthothioformate noun: Any orthoester, formally derived from (the unstable) thioformic acid, of general formula HC(SR)₃
orthotic adjective, noun: Of or pertaining to orthotics.
orthotics noun: The design, manufacture and installation of orthopedic appliances to support, straighten or improve the function of a body part
orthotist noun /ˈɔɹθətɪst/: A person who makes or fits orthotic devices.
orthotitanate noun: A salt or ester of orthotitanic acid.
orthotitanic acid noun: An acid of titanium (H₄TiO₄); a form of titanic acid.
orthotolidine noun: An organic compound with chemical formula (C₆H₄(CH₃)NH₂)₂, used mainly in dye production.
orthotomic adjective, noun: Cutting at right angles.
orthotomic circle noun: A circle that cuts three other given circles at right angles.
orthotomous adjective: Having two cleavages at right angles with one another.
orthotomy noun: The property of cutting at right angles.
orthotone adjective, noun: Retaining the accent independently; not enclitic; said of certain indefinite pronouns and adverbs when used interrogatively, which are enclitic in other...
orthotonesis noun: The accentuation of a proclitic or enclitic.
orthotonic adjective: orthotone
orthotonos noun: muscular rigidity associated with tetanus
orthotonus noun: Alternative form of orthotonos.
orthotope noun: The generalization of a rectangle for higher dimensions, formally defined as the Cartesian product of intervals.
orthotopic adjective: in the normal position
orthotopical adjective: Alternative form of orthotopic.
orthotopically adverb: In an orthotopic manner.
orthotospovirus noun: Any virus of the genus Orthotospovirus
orthotransplantation noun: orthotopic transplantation
orthotriaene noun: a sponge spicule that has three short rays projecting at right angles from a longer one
orthotrichaceous adjective: Of or relating to the Orthotrichaceae.
orthotropal adjective: orthotropic
orthotrophic adjective: Relating to orthotrophy
orthotrophy noun: The practice of eating the "correct" things
orthotropia noun: The normal absence of heterotropia.
orthotropic adjective /ˌɔːθəˈtɹɒpɪk/: Growing vertically, either upwards or downwards.
orthotropically adverb /ˌɔːθəˈtɹɒpɪkli/: In an orthotropic manner.
orthotropics noun /ɔɹθotɹɒpɪks/: an orthodontic method invented by John Mew which is claimed to be able to guide facial growth.
orthotropism noun: The property of being orthotropic or orthotropous.
orthotropous adjective: Growing straight and having the micropyle at the apex
orthotropously adverb: In an orthotropous manner.
orthotropy noun: The condition of being orthotropic.
orthotype noun: The original published name for a group of genetically related organisms.
orthotypic adjective: Relating to orthotypes.
orthotypographic adjective: Of or relating to orthotypography.
orthotypographical adjective: Of or relating to orthotypography.
orthotypography noun: The study of correct typography according to established usage.
orthovanadate noun: The oxyanion of vanadium VO₄³⁻ or any salt containing this ion
orthovoltage noun: A voltage of about 300 to 500 kilovolts, when used in radiation therapy.
orthowalpurgite noun: An orthorhombic-dipyramidal pale yellow mineral containing arsenic, bismuth, hydrogen, oxygen, and uranium.
orthowater noun: Synonym of polywater.
orthox noun: A form of orthic oxisol.
orthoxylene noun: An aromatic hydrocarbon based on benzene with two methyl substituents bonded to adjacent carbon atoms in the benzene ring (the ortho configuration).
orthros noun: The divine office or service at dawn.
orticant adjective: That irritates the skin
ortive adjective: Of or relating to the time or act of rising; eastern.
Ortiz proper noun /ɔɹˈtiz/: A surname from Spanish.
Ortley proper noun: A ghost town in Oregon.
Ortman proper noun: A surname from German.
Ortmann proper noun: A surname from German.
Ortner proper noun: A surname from German.
Ortner's syndrome noun: A rare cardiovocal syndrome involving recurrent laryngeal nerve palsy from cardiovascular disease.
Ortokid adjective, noun: Alternative form of Artuqid.
ortol noun: A particular chemical used as a photographic developer.
ortolan noun /ˈɔː.təl.ən/: A small European migratory bunting (Emberiza hortulana), once eaten whole as a delicacy.
ortolan bunting noun: Emberiza hortulana, a passerine bird in the bunting family Emberizidae.
Orton proper noun /ˈɔː.tən/: A surname.
Orton cone noun: Synonym of pyrometric cone.
Ortonesque adjective: In a style reminiscent of John Kingsley "Joe" Orton (1933-1967), English playwright who wrote scandalous black comedies.
Ortonian adjective /ɔːˈtəʊ.ni.ən/: Of or relating to Joe Orton (1933–1967), English playwright and author.
Ortonville proper noun: An unincorporated community in Ventura County, California, United States.
Ortoqid adjective, noun: Alternative form of Artuqid.
Ortrud proper noun: A female given name.
Ortsgruppenleiter noun: a Nazi party political rank and title which existed between 1930 and 1945.
ortstein noun: A hardpan, typically in a podzol
ortygan noun: Any of various buttonquails.
Ortygia proper noun: A small island which is the historical centre of the city of Syracuse, Sicily.
Ortygian adjective, noun: Of or relating to the island of Ortygia.
orujo noun: A brandy from northern Spain, made from grapes.
Oruro proper noun: A city, the capital of Oruro department, Bolivia.
orussid noun: Any wasp of the family Orussidae.
orutu noun: A one-stringed African fiddle, played especially by the Luo people.
oruwacin noun: A certain naturally-occurring tetracyclic spirolactone iridoid.
ORV noun: A motor vehicle restricted to non-road venues. A vehicle not allowed on public roadways.
orval noun: A sage, of species Salvia viridis.
orvet noun: The slowworm.
orvietan noun /ˌɔːvɪˈeɪtən/: A medicinal preparation made from herbs, wine and honey, thought to be an antidote for any poison.
orvietite noun: A mineral consisting of a mixture of plagioclase and sanidine with smaller amounts of leucite and augite, etc.
Orvieto noun /ɔːˈvjɛt.əʊ/: A white wine from that town.
Orvieto ware noun: Tin-glazed earthenware (majolica) of the kind originally manufactured in Orvieto, Italy, in the 13th century.
Orville proper noun: A male given name originating as a coinage.
Orvis proper noun: A surname.
ORW noun: Initialism of oral rehydration worker.
Orwell proper noun /ˈɔːwɛl/: A village and civil parish in South Cambridgeshire district, Cambridgeshire, England (OS grid ref TL3650).
Orwellesque adjective: Synonym of Orwellian.
Orwellian adjective /ɔɹˈwɛli.ən/: Resembling the totalitarian political methods decried in the works of writer George Orwell, particularly in the dystopian novel Nineteen Eighty-Four;...
Orwellianism noun: Orwellian systems or methods generally; totalitarian propaganda, surveillance, repression, etc.
Orwellianistic adjective: Of or related to Orwellianism
Orwellianly adverb: In an Orwellian manner.
Orwellism noun: Synonym of Orwellianism.
orxata noun: Alternative form of horchata.
-ory suffix /-(ə)ɹi/: Added to nouns and verbs (often Latinate) to form adjectives meaning “of”, “pertaining to”, or “serving for”.
oryctere noun: The aardvark.
orycteropodid noun: Any member of the Orycteropodidae, the aardvark and its extinct relatives.
orycteropodoid adjective: Relating to, or characteristic of an orycterope
oryctics noun: The branch of geology relating to fossils.
oryctognostic adjective: Relating to oryctognosy.
oryctognostical adjective: Relating to oryctognosy.
oryctognostically adverb: In a manner relating to oryctognosy.
oryctognosy noun: Knowledge about things dug up, especially what is now considered mineralogy.
oryctographic adjective: Relating to oryctography.
oryctographical adjective: Alternative form of oryctographic.
oryctographically adverb: In a manner relating to oryctography.
oryctography noun: The description of fossils.
oryctologic adjective: Relating to oryctology.
oryctological adjective: Of or pertaining to oryctology.
oryctologist noun: Someone versed in oryctology.
oryctology noun: The study of things dug out of the earth, including minerals and fossils.
oryctozoology noun: The zoology of fossils
orygine adjective: Relating to, or characteristic of an oryx
Oryol proper noun: An oblast of Russia.
orysastrobin noun: A particular fungicide.
oryx noun /ˈɔɹ.ɪks/: Any of several antelopes, of the genus Oryx, native to Africa, which have long, straight horns
oryzacystatin noun: A cysteine proteinase inhibitor of rice.
oryzalexin noun: Any of a particular class of diterpene phytoalexins, typically obtained from rice leaves
oryzalin noun: A selective herbicide used to control annual grasses etc. in food crops
oryzanol noun: An antioxidant found in rice bran oil.
oryzastrobin noun: A particular strobilurin fungicide.
oryzavirus noun: Any virus of the genus Oryzavirus
oryzenin noun: A glutelin that is the main protein in rice
oryzin noun: A predominant extracellular alkaline endopeptidase of the mold Aspergillus oryzae.
oryzivorous adjective /ˌɒɹɪˈzɪvəɹəs/: Having a diet rich in rice.
oryzoid adjective, noun: Of or pertaining to rice-like plants of the Oryzoideae.
oryzomyine noun: Any member of the rodent tribe Oryzomyini, including the rice rats.
Orzechowski proper noun: A surname from Polish.
orzo noun /ˈɔːzəʊ/: A form of pasta the size and shape of grains of rice or barley; often used in soups.
os adjective, adverb, infix, noun, prefix, suffix /ˌoʊ ˈɛs/: Initialism of outsize, clothes for large people.
os capitatum noun: The capitate bone.
os clitoridis noun: The baubellum.
os clitoris noun: Alternative form of os clitoridis (based on differences in declension of the New Latin word clitoris)
os cordis noun: Ossified cardiac cartilagenous tissue, typically parts of the cardiac skeleton.
os coxae noun: Synonym of hip bone.
os cuneiforme noun: Synonym of cuneiform bone.
OS&D phrase: Initialism of over, short and damaged.
OS diaper noun: Abbreviation of one-size diaper (“a type of cloth diaper which can be adjusted and lengthened to match the baby's growth, thus allowing the diaper to be...
os innominatum noun: The innominate bone (hip bone).
os magnum noun: The capitate bone.
OS nappy noun: Abbreviation of one-size nappy.
os paracuneiforme noun: An ossicle that occasionally exists on the medial side of the medial cuneiform bone.
os penis noun: The baculum.
OS-specific adjective: written for a specific operating system
os trapezoideum noun: Synonym of trapezoid bone.
os trochleare calcanei noun: An ossicle that occasionally exists on the lateral side of the peroneal tubercle.
OS&Y noun: Initialism of outside stem and yoke valve.
OSA adjective, noun: Initialism of obstructive sleep apnea.
Osage noun /ˈoʊseɪdʒ/: A member of the Osage Nation.
Osage apple noun: The fruit of the Maclura pomifera, a small deciduous tree or large shrub, native to the south central United States.
osage orange noun: The tree Maclura pomifera, noted for its large, dense, wrinkly, bright green and unpalatable fruit, once a popular hedge tree in the United States.
Osage thorn noun: A stout, sharp thorn found on the tree of the Osage apple, Maclura pomifera.
osajaxanthone noun: A yellow pigment found in certain plants.
osajin noun: A flavonoid pigment found in the horseapple.
Osaka proper noun /əʊˈsɑːkə/: The capital city of Osaka Prefecture, Japan.
Osakan adjective, noun /əʊˈsɑːkən/: Of, relating to, from, or characteristic of Osaka in Japan.
osakate noun: A kimarite in which the attacker, grappling near the edge, bends backwards and swings his opponent around and out.
osalmid noun: A choleretic drug.
Osam proper noun: A river in Bulgaria
Osama proper noun /əʊˈsɑːmə/: A male given name from Arabic.
Osamu proper noun: A male given name from Japanese.
osanetant noun: A neurokinin 3 receptor antagonist being researched for the treatment of schizophrenia.
osar noun: An esker.
osari noun: A kind of Kandyan sari having a frill and sometimes puffed-up sleeves.
osariya noun: Alternative form of osari (“type of sari”).
osarizawaite noun: A greenish-yellow mineral with the chemical formula PbCuAl₂(SO₄)₂(OH)₆, having rhombohedral crystals.
osarsite noun: A monoclinic-prismatic gray mineral containing arsenic, osmium, ruthenium, and sulfur.
OSAS phrase: Abbreviation of once saved, always saved (“a statement affirming perseverance of the saints”).
Osasco proper noun: A municipality of São Paulo, Brazil.
OSASH noun: Initialism of obstructive sleep apnea/sleep hypopnea.
osaterone noun: A particular antiandrogen.
Osawa proper noun: A surname from Japanese.
osazone noun: any glycoside of an aldose or 2-ketose formed by reaction with excess of an aryl-hydrazine
OSB noun: Initialism of oriented strand board, a type of engineered dimensional lumber board, composed of laminated wood.
Osbaldeston proper noun: A village and civil parish in Ribble Valley district, Lancashire, England (OS grid ref SD6431).
osbipy noun /ˈɒzˌbɪpi/: A compound, formed from osmium tetroxide and 2,2'-bipyridine, used to label thymidine during electrophoresis
Osborn proper noun: An English surname transferred from the given name.
Osborne proper noun /ˈɒzbɔː(ɹ)n/: An English surname transferred from the given name.
osbornite noun: A golden yellow mineral containing nitrogen and titanium.
Osbourn proper noun /ɒzbɔːɹn/: A settlement in Antigua and Barbuda.
OSC noun: Initialism of order to show cause.
Oscan adjective, noun /ˈɒskən/: Of or pertaining to the Oscan language or Oscan people, or their writing system.
oscar noun /ˈɑs.kɚ/: An Academy Award.
Oscar Asche noun: cash; money.
Oscar bait noun: A film or films perceived to have been produced at least partially in order to be nominated for, and hopefully win, an Academy Award.
Oscar-baity adjective: Being Oscar bait.
Oscared adjective: Having been awarded an Oscar statuette.
oscarellid noun: Any of the family Oscarellidae of marine sponges.
oscarkempffite noun: A rare opaque mineral found in Bolivia with the chemical formula Ag₁₀Pb₄(Sb₁₇Bi₉)S₄₈.
Oscarless adjective: Not winning, or having won, an Oscar (an Academy Award)
Oscarlike adjective: Resembling an Oscar (an Academy Award statue)
Oscarologist noun: An expert in the Oscars
Oscarworthy adjective: Worthy of winning an Oscar (an Academy Award).
OSCE noun: Initialism of objective structured clinical examination.
Osceola proper noun: A community in Admaston/Bromley, Renfrew County, Ontario, Canada.
oscheal adjective: Pertaining to the scrotum.
oscheocele noun: A scrotal hernia.
oscheoplasty noun: plastic surgery of the scrotum
Osci noun: An ancient Italic people from Campania in Italy.
oscietra noun: Alternative form of osetra (“type of caviar”).
oscillancy noun: oscillation.
oscillate verb /ˈɑsɪleɪt/: To swing back and forth, especially if with a regular rhythm.
oscillating adjective, verb: Moving in a repeated back-and-forth motion; coming and going.
oscillating tool noun: Synonym of multitool (“an oscillating power tool that can perform multiple functions with different attachments”).
oscillating wave test system noun: A test to identify, evaluate and locate partial discharge faults in cable insulation and accessories.
oscillatingly adverb: In an oscillating way or manner.
oscillation noun /ˌɒ.sɪˈleɪ.ʃən/: the act of oscillating or the state of being oscillated
oscillational adjective: Relating to oscillation.
oscillationally adverb: In terms of oscillation.
oscillationless adjective: Without oscillation.
oscillationlike adjective: Resembling oscillation; moving back and forth, or appearing to do so.

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 O: 20,049 words, in 67 parts.