English words: orthodiagraphy to orthoptic

300 English words, part 39 of 67 of the words starting with O, A to Z. 18 have a page of their own.

English words orthodiagraphy to orthoptic

orthodiagraphy noun: Examination by means of an orthodiagraph.
orthodigita noun: A correction of a misalignment of the toes
orthodiphenol noun: Any diphenol in which the two hydroxyls are in the ortho position
orthodiphenolic adjective: Relating to an orthodiphenol
orthodome noun: A dome that is parallel to the orthodiagonal in a monoclinic crystal.
orthodont adjective: Of teeth, pointing downwards.
orthodontal adjective: orthodontic
orthodontia noun: Synonym of orthodontics.
orthodontic adjective: Of, or relating to the dental speciality of orthodontics.
orthodontic band noun: A thin strip of metal, cemented to the crown of a tooth, to which wires are attached in order to reposition teeth
orthodontically adverb: By orthodontic means.
orthodontics noun: A specialty of dentistry concerned with correcting misalignment of teeth.
orthodontist noun /ˌɔː(ɹ)θəˈdɒntɪst/: An orthodontic dentist.
orthodontology noun: Orthodontics.
orthodonture noun: Orthodontics.
orthodox adjective, noun /ˈɔːθədɒks/: Conforming to the accepted, established, or traditional doctrines of a given faith, religion, or ideology.
Orthodox Church noun: The Eastern Orthodox Church.
orthodox file manager noun: A file manager program with a traditional textbased user interface.
Orthodox Jew noun: An adherent of Orthodox Judaism
Orthodox Jewish adjective: Of or relating to Orthodox Jews or Orthodox Judaism
orthodox spin noun: finger spin
orthodox spinner noun: A finger spinner.
orthodoxality noun: The quality of being orthodox.
Orthodoxan noun: Alternative form of orthodoxian.
orthodoxia noun: Correct praise; correct faith.
orthodoxian adjective, noun: Of or pertaining to Orthodox beliefs.
orthodoxic adjective: orthodox
orthodoxical adjective: Dated form of orthodox.
orthodoxically adverb: In an orthodoxical manner.
orthodoxise verb: Alternative form of orthodoxize.
orthodoxism noun: Strict orthodoxy.
orthodoxist noun: An advocate of a rigid orthodoxy
orthodoxization noun: The process of making orthodox.
orthodoxize verb: To render something or someone orthodox.
orthodoxly adverb /ˈɔːθədɒksli/: In a correct or proper way; conventionally; correctly.
orthodoxness noun: The state or condition of being orthodox.
orthodoxy noun /ˈɔːθədɒksi/: Correctness of doctrine and belief in regard to any doctrinal (i.e. philosophical or theological) system.
orthodromal adjective: orthodromic
orthodrome noun: A great circle, or part of one.
orthodromic adjective: Of or relating to a means of navigation by following an arc of the great circle corresponding to the shortest distance between two points on the globe.
orthodromically adverb: In an orthodromic manner
orthodromics noun: orthodromic navigation
orthodromy noun: Navigation based on calculating the shortest distance between two locations on a globe or sphere.
orthoepic adjective /ˌɔːθəʊˈɛpɪk/: Synonym of phonological: concerning the study of pronunciation.
orthoepical adjective: Synonym of orthoepic.
orthoepically adverb: In an orthoepical manner: pronounced correctly or in accordance with standard usage.
orthoepist noun /ɔːˈθəʊɪˌpɪst/: An expert at orthoepy: a person who studies the pronunciation of words, especially (historical) one of the orthoepists, 16th- and 17th-century linguists who...
orthoepistic adjective: Relating to orthoepists or to orthoepy
orthoepistical adjective /ˌɔːr.θi.əˈpɪs.tɪ.kəl/: orthoepistic
orthoepy noun /ˈɔː.θəʊˌiː.pi/: The study of pronunciation.
orthoericssonite noun: An orthorhombic-dipyramidal reddish black mineral containing barium, hydrogen, iron, manganese, oxygen, and silicon.
orthoester noun: Any compound, of general formula R-C(OR^')₃, having three alkoxy groups on a single carbon atom
orthoevolution noun: orthogenesis
orthoevolutionary adjective: Of or relating to orthoevolution.
orthoexciton noun: An exciton whose spin is parallel to that of its hole
orthofacial adjective: Describing surgery to the bones of the face augmented by plastic surgery to the overlying tissue
orthofelsite noun: Synonym of orthophyre.
orthoferrite noun: Any of a class of chemical compounds with the general formula RFeO₃, where R is any rare earth element.
orthoferrosilite noun: An iron silicate that crystallizes as an orthorhombic pyroxene
orthofluvial adjective: Describing the area, next to a river, that is frequently flooded
orthoform noun: A former anaesthetic.
orthoformate noun: Any orthoester, formally derived from formic acid, of general formula HC(OR)₃
orthogamous adjective: Of or pertaining to orthogamy
orthogamy noun: fertilization of the ovules of a plant by pollen from the same plant
orthogastropod noun: Any snail of the subclass Orthogastropoda.
orthogenesis noun: The hypothesis that evolution tends toward a certain goal, at least at some scales.
orthogenetic adjective: Of or pertaining to orthogenesis or orthogenetics.
orthogenetical adjective: Alternative form of orthogenetic.
orthogenetically adverb: In terms of, or by means of, orthogenesis.
orthogeneticist noun: One who supports the idea of orthogenesis.
orthogenetics noun: orthogenesis
orthogenic adjective: Relating to orthogenesis.
orthogenomic adjective: Relating to orthogenomics
orthogenomics noun: The application of genomics to orthopedics
orthogeosyncline noun: A linear geosynclinal belt lying between continental and oceanic cratons, and having internal volcanic belts (eugeosynclinal) and external nonvolcanic belts...
orthogeriatric adjective: Describing orthopaedic care for geriatric patients
orthogeriatrics noun: orthopaedics for geriatric patients
orthogeris noun: Orthogeriatrics.
orthoglycaemic adjective: Alternative form of orthoglycemic.
orthognathic adjective: Straight-jawed.
orthognathism noun: The quality of being orthognathous.
orthognathous adjective: Straight-jawed.
orthognathy noun: The condition of being orthognathous
orthogneiss noun: A gneiss derived from an igneous rock.
orthogon noun: A right-angled triangle.
orthogonal adjective, noun /ɔːˈθɒɡ.ə.nəl/: Of two objects, at right angles; perpendicular to each other.
orthogonal complement noun: The set of all vectors which are orthogonal to a given set of vectors.
orthogonal function noun: Either of a pair of functions whose inner product is zero
orthogonal group noun: For given n and field F (especially where F is the real numbers), the group of n × n orthogonal matrices with elements in F, where the group operation is...
orthogonal matrix noun: A square matrix whose columns, considered as vectors, are orthonormal to each other. This implies that the transpose of such a matrix is also its inverse.
orthogonalisation noun: Alternative spelling of orthogonalization.
orthogonalise verb: Alternative form of orthogonalize.
orthogonality noun /ɔːˌθɒɡ.əˈnæl.ɪ.ti/: The property of being orthogonal.
orthogonalization noun: The process of converting a set of functions or vectors into orthogonal ones.
orthogonalize verb: To make orthogonal.
orthogonally adverb: In an orthogonal manner; perpendicularly; at right angles
orthogonial adjective: Alternative form of orthogonal.
Orthogonian adjective, noun: A member of the Orthogonian society, a social club at Whittier College founded by Richard M. Nixon in opposition to the wealthy elites at Whittier.
orthogonium noun: right-angled triangle
orthograde adjective: Walking or standing with the body upright.
orthogradely adverb: In an orthograde manner.
orthograft noun: an orthotopic graft
orthograph noun /ˈɔː(ɹ)θəɡɹæf/: An orthographic projection.
orthographer noun: Someone who devises an orthography.
orthographic adjective /ˌɔːθəˈɡɹæfɪk/: Of a projection used in maps, architecture etc., in which the rays are parallel.
orthographic neighbor noun: US standard spelling of orthographic neighbour.
orthographic neighborhood noun: The set of words that can be formed by changing one letter while maintaining letter positions.
orthographic neighbour noun: A word that differs from another word of the same length by only one letter.
orthographic neighbourhood noun: UK standard spelling of orthographic neighborhood.
orthographical adjective: Of, or relating to orthography or spelling.
orthographically adverb: Regarding or relating to orthography (the way in which languages, usually natural languages, are written).
orthographise verb: Alternative form of orthographize.
orthographist noun: One who is versed in orthography.
orthographize verb: To spell correctly or according to usage or pronunciation.
orthography noun, verb /ɔːˈθɒɡɹəfi/: A method of representing a language or the sounds of language by written symbols; spelling.
orthograptid noun: Any graptolite of the genus Orthograptus.
orthogravitropism noun: The normal tendency of a plants parts to bend downward under the effects of gravity
orthogrid noun: A structure similar to an isogrid but having rectangular rather than triangular openings.
orthogroup noun: The group of genes descended from a single gene in the last common ancestor of a clade of species.
orthohantavirus noun: Any member of the genus Orthohantavirus of single-stranded, enveloped, negative-sense RNA viruses.
orthohedric adjective: Relating to, or characteristic of an orthohedron
orthohedron noun: A figure, somewhat like a cube but with two square faces and four rectangular faces
orthohepadnaviral adjective: Relating to orthohepadnaviruses
orthohepadnavirus noun: Any virus of the genus Orthohepadnavirus
orthohexagonal adjective: Having orthorhombic hexagonal symmetry
orthohyperkeratosis noun: Synonym of orthokeratosis.
orthohyperkeratotic adjective: Relating to orthohyperkeratosis.
orthoimage noun: An orthophoto.
orthoimagery noun: orthoimages in general; their production
orthokeratological adjective: Relating to orthokeratology.
orthokeratology noun: The creation of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors.
orthokeratosis noun: Hyperkeratosis without parakeratosis.
orthokeratotic adjective: Related to orthokeratosis
orthokinesis noun: A form of kinesis in which the speed of movement of the individual is dependent upon the intensity of the stimulus.
orthokinetic adjective: Describing any property related to the kinetic energy imparted by collisions with other bodies
ortholattice noun: An orthocomplemented lattice.
ortholinear adjective: Of a keyboard, having keys that are aligned in a perfect grid.
ortholinearity noun: The state of being ortholinear.
ortholog noun: Any of two or more homologous gene sequences found in different species related by linear descent.
orthological adjective: Relating to orthology
orthologization noun: The process of rendering something orthologous.
orthologous adjective: Exhibiting orthology; having been separated by a speciation event. Usually while retaining the same function.
orthologously adverb: In regard to, or by means of orthology
orthologue noun: One of two or more homologous gene sequences found in different species.
orthology noun: Correct speaking or the correct use of words.
orthomagmatic adjective: Relating to the main phase of crystallisation of magma.
orthomegodont adjective: Being or having teeth with a nonelongated crown and symmetrical median labial lobe, especially in rodents such as zokors.
orthometer noun: A device for measuring the asymmetry of teeth.
orthometric adjective: Having axes at right angles.
orthometrically adverb: In an orthometric manner.
orthometry noun: The art or practice of constructing verses correctly or harmoniously; the rules of correct poetry.
orthominasragrite noun: An orthorhombic-pyramidal mineral containing hydrogen, oxygen, sulfur, and vanadium.
orthomitosis noun: A form of mitosis characterized by an axial, central, symmetric, and bipolar spindle.
orthomode noun: describing a transducer that use two orthogonally polarized microwave beams
orthomodular adjective: Describing a lattice with the property that its every orthogonal pair is modular.
orthomodularity noun: The condition of being orthomodular
orthomolecular adjective: Relating to the theory that human health, including mental illness, depends upon chemical deficiencies and can be cured with vitamins etc.
orthomorphic adjective: conformal
orthomorphism noun: A morphism that is also a permutation
orthomorphodont adjective: Having the normal form of dentition
orthomosaic noun: A mosaic of orthorectified images
orthomyxoviral adjective: Relating to the orthomyxoviruses.
orthomyxovirus noun: Any RNA virus of Orthomyxoviridae family characterised by having two long glycoprotein spikes.
orthonairovirus noun: Any virus of the genus Orthonairovirus
orthonasal adjective: Perceived via the front of the nose (by sniffing)
orthonasally adverb: In an orthonasal manner
orthonectid noun: Any of the Orthonectida, a small phylum of parasites of marine invertebrates.
orthoneurous adjective: Exhibiting or relating to orthoneury.
orthonitrate noun: The anion NO₄³⁻ or any salt containing this anion
orthonitric acid noun: hypothetical acid H₃NO₄
orthonitrotoluene noun: An organic compound with the formula CH₃C₆H₄NO₂.
orthonormal adjective: Of a set of vectors, both orthogonal and normalized.
orthonormal function noun: An orthogonal function whose inner product with itself is unity
orthonormalisation noun: Alternative spelling of orthonormalization.
orthonormalised adjective: Alternative spelling of orthonormalized.
orthonormality noun: The condition of being orthonormal
orthonormalization noun: A form of orthogonalization in which the resulting vectors are all unit vectors
orthonormalize verb: To make a set of vectors both orthogonal and normalized.
orthonormalized adjective: Subject to, or produced by orthonormalization
orthonormalizing adjective, verb: That orthonormalizes
orthonormally adverb: In an orthonormal manner
orthonychid noun: Any logrunner in the family Orthonychidae.
orthonym noun: The real name of a person who uses a pseudonym.
orthonymous adjective: Of, pertaining to, or being an orthonym.
orthopædia noun: Dated spelling of orthopaedia.
orthopædic adjective: Dated spelling of orthopaedic.
orthopædics noun: Dated spelling of orthopaedics.
orthopædist noun: Dated spelling of orthopaedist.
orthopaedia noun: Alternative spelling of orthopedia.
orthopaedic adjective: Alternative spelling of orthopedic.
orthopaedic bed noun: Alternative spelling of orthopedic bed.
orthopaedical adjective: Pertaining to orthopaedics; characteristic of orthopaedia.
orthopaedically adverb: Alternative form of orthopedically.
orthopaedics noun: Alternative spelling of orthopedics.
orthopaedist noun: Alternative spelling of orthopedist.
orthopaedy noun: Alternative form of orthopedy.
orthopair noun: A pair of orthogonal or disjoint subsets (of a given universe)
orthopalinal adjective: Moved backwards and forwards in a straight line
orthopalinally adverb: In an orthopalinal manner
orthopanoramic adjective: By means of an orthopantomograph
orthopantomogram noun: A panoramic radiograph of the whole mouth, including the jaws and teeth.
orthopantomograph noun: A panoramic dental X-ray device
orthopantomographic adjective: Relating to orthopantomography.
orthopantomographically adverb: By means of orthopantomography.
orthopantomography noun: A form of radiography that produces panoramic images of the mouth.
orthopathy noun: An alternative-medicine philosophy advocating a vegetarian raw-food diet with periods of intermittent fasting.
orthoped noun /ˈɔːθəˌpiːd/: Synonym of orthopod.
orthopedagogic adjective: Relating to orthopedagogy
orthopedagogical adjective: Relating to orthopedagogy
orthopedagogy noun: The teaching of correct behaviour
orthopedal adjective: Orthogonal to the foot of a geometric figure.
orthopedia noun: The branch of medicine which deals with the prevention and correction of deformities in bodies; orthopedics.
orthopediatrician noun: A doctor who specializes in orthopedics
orthopedic adjective /ˈɔɹθəpidɪk/: Of or relating to orthopedics.
orthopedic bed noun: A bed designed to relieve specific skeletal symptoms, typically having a very firm mattress or a board.
orthopedic shoe noun: A shoe designed to correct a specific deformity of the foot.
orthopedic surgeon noun: An orthopedist.
orthopedical adjective: Alternative form of orthopaedical.
orthopedically adverb: In an orthopedic manner.
orthopedics noun /ˌɔːθəˈpiːdɪks/: The branch of medicine that deals with the prevention or correction of disorders of the bones and associated muscles and joints.
orthopedist noun /ˌɔɹθə(ʊ)ˈpiːdɪst/: A surgeon who specializes in orthopedics.
orthoperiodate noun: The oxyanion IO₆⁵⁻ or any salt containing this anion
orthoperiodic adjective: Relating to orthoperiodic acid
orthoperiodic acid noun: The oxyacid of iodine IO(OH)₅
orthopervanadate noun: The oxyanion of vanadium VO₆³⁻ or any salt containing this anion
orthophasmavirus noun: Any RNA virus of the genus Orthophasmavirus
orthophemism noun: An orthophemistic term, one that is neither euphemism nor dysphemism.
orthophemistic adjective: Plainly denotative; not euphemistic or dysphemistic.
orthophenylene noun: The ortho- form of the phenylene radical.
orthophenylphenol noun: A biocide used as a preservative, consisting chemically of two linked benzene rings and a phenolic hydroxyl group.
orthophlebiid noun: Any scorpionfly of the family Orthophlebiidae
orthophonic adjective: Relating to orthophony
orthophonist noun: speech therapist
orthophony noun /ɔː(ɹ)ˈθɒfəni/: The art of correct articulation / speaking
orthophoria noun: The normal condition in which the tension of the extrinsic eye muscles is equal, the visual axes being therefore parallel
orthophoric adjective, noun: Relating to orthophoria.
orthophosphate noun: Any salt or ester of orthophosphoric acid; an ordinary phosphate
orthophosphite noun: Phosphite.
orthophosphoric adjective: Describing the ordinary form of phosphoric acid and its derivatives
orthophosphoric acid noun: Ordinary phosphoric acid, H₃PO₄
orthophoto noun: An aerial photograph that has been geometrically corrected (orthorectified) such that the scale of the photograph is uniform, meaning that the photo can be...
orthophotograph noun: Synonym of orthophoto.
orthophotographic adjective: Of or relating to orthophotography.
orthophotographically adverb: In terms of, or by means of, orthophotography.
orthophotography noun: The geometrical correction of aerial photographs so that their displayed distances are rendered uniform and can be measured like a map.
orthophotomap noun, verb: A map in the form of an orthophotomosaic.
orthophotomosaic noun: An image composed of multiple orthophotos
orthophotoquad noun: A quadrangle of orthophotos
orthophthalic adjective: Relating to ortho isomers of phthalic compounds
orthophyre noun: a porphyritic rock that contains phenocrysts of orthoclase embedded in feldspar
orthophyric adjective: Relating to or composed of orthophyre
orthopia noun: Normal vision; an absence of a visual disorder.
orthopic adjective: Of or pertaining to orthopia; of normal vision.
orthopically adverb: In an orthopic manner.
orthopinacoid noun: Either of the two planes in the monoclinic system which are parallel to the vertical and orthodiagonal axes.
orthopinakiolite noun: An orthorhombic-dipyramidal black mineral containing boron, iron, magnesium, manganese, and oxygen.
orthoplasy noun: A theory of evolution, stating that that individual modifications supplement, protect, or screen organic characters and keep them alive until useful...
orthoplex noun: A convex polytope analogous to an octahedron (3 dimensions) or 16-cell (4 dimensions).
orthoploid adjective: euploid
orthopnea noun: Alternative spelling of orthopnoea.
orthopneic adjective: Of or relating to orthopnea–a morbid condition in which respiration can be performed only in an erect posture.
orthopneic position noun: A position in which a person sits upright in a bed, possibly bending forward.
orthopneumovirus noun: Any virus of the genus Orthopneumovirus.
orthopnic adjective: Exhibiting or relating to orthopnoea.
orthopnoea noun /ɔrˈθɒpniə/: Shortness of breath when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair.
orthopnoeic adjective: Alternative form of orthopneic.
orthopnoic adjective: Rare spelling of orthopnoeic.
orthopny noun: Dated form of orthopnoea.
orthopod noun: An orthopaedic surgeon.
orthopositronium noun: The state of a positronium exotic atom in which the positron and electron have parallel spins
orthopox noun: Infection with an orthopoxvirus.
orthopoxviral adjective: Of or relating to orthopoxviruses.
orthopoxvirus noun: Any of the genus Orthopoxvirus of poxviruses, including smallpox and many species isolated from mammals.
orthopractic adjective: Relating or conforming to orthopraxy.
orthoprax adjective /ˈɔːθəpɹaks/: Correct in practice (though not necessarily in opinion or belief); practically right, doing the right actions.
orthopraxic adjective: Alternative form of orthopractic, relating or conforming to orthopraxy.
orthopraxical adjective: orthopractic
orthopraxically adverb: In an orthopraxical fashion.
orthopraxis noun: orthopraxy
orthopraxy noun /ˈɔːθəˌpɹæksi/: Correctness of practice or action in regard to religion and especially religious ritual, particularly in juxtaposition to "correct doctrine", or "correct...
orthoprism noun: A prism which has its faces parallel to its vertical axis.
orthoprosthesis noun: An orthodontic prosthesis
orthopsychiatric adjective: Of or pertaining to orthopsychiatry.
orthopsychiatrist noun: A psychiatrist involved in orthopsychiatry.
orthopsychiatry noun: branch of psychiatry concerned with the prevention of mental illness, especially in the young
orthopsychology noun: An approach to psychology focusing on positive human traits such as love, creativity, and personal autonomy.
orthopter noun: Any insect of the order Orthoptera
orthoptera noun: Any of very many four-winged insects, of the order Orthoptera, such as grasshoppers, crickets and locusts
orthopteral adjective: Synonym of orthopterous.
orthopteran noun: Any of many insects of the order Orthoptera.
orthopterist noun: An entomologist who specialises in orthopters
orthopteroid noun /ɔːˈθɒptəɹɔɪd/: Any of the insects historically included in the order Orthoptera, including the cockroaches, earwigs, praying mantises, etc.
orthopterologic adjective: Relating to orthopterology.
orthopterological adjective: Relating to orthopterology.
orthopterologically adverb: In terms of orthopterology.
orthopterologist noun: An entomologist who studies orthopterology.
orthopterology noun: The scientific study of the Orthoptera.
orthopteron noun: Alternative form of orthopteran.
orthopterous adjective: Belonging to the Orthoptera.
orthoptic adjective, noun: Relating to orthoptics, the study and treatment of muscular irregularities of the eye.

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.