Iso- - Wiktionary

See also: Appendix:Variations of "iso"

English

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Alternative forms

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• is- (before a vowel)

Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Pronunciation

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• (Received Pronunciation) IPA(key): /aɪsə-/, /aɪsəʊ-/, /aɪˈsɒ-/
• (General American) IPA(key): /aɪsə-/, /aɪsoʊ-/, /aɪˈsɑ-/, /aɪˈsɔ-/

• Audio (US):

  (file)

• Hyphenation: i‧so-

Prefix

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iso-

1. Same, identical. Synonyms: ipsi-, homo-, syn- / sym- Antonyms: hetero-, allo- ‎iso- + ‎effect → ‎isoeffect ‎iso- + ‎intense → ‎isointense
2. Equal; equivalent. Synonyms: equi-, pari- Antonym: aniso- ‎iso- + ‎rhythm → ‎isorhythm
3. (chemistry) Isomer. ‎iso- + ‎methadone → ‎isomethadone
4. (organic chemistry) Of an aliphatic compound, especially a fatty acid, having a branch on the penultimate carbon atom of a chain. ‎iso- + ‎hexane → ‎isohexane
5. (meteorology, geography) Forms terms for specific kinds of isolines. ‎iso- + ‎-therm → ‎isotherm ‎iso- + ‎-chrone → ‎isochrone
6. (mathematics) Isomorphism.

Derived terms

[edit] English terms prefixed with iso- isoabsorption isoabsorptive isoacceptor isoacid isoactin isoactinic isoaddition isoagglutinin isoajmaline isoalantolactone isoaldehyde isoalkane isoallele isoallelic isoallergen isoallergenic isallobar alloisocitrate isoallotype isoallotypic isoalloxazine isoametropia isoamidone isoamylase isoamylene isoanabase isoandrographolide isoandrosterone isoanethole aniso- anisomelia anisometropia anisomyarian anisosyllabic anisosyllabism isanomal isanomaly isoantagonism isoantagonistic isantherous isanthesic isoantibody isoantigen isoapiole isoapoptotic isoaporphine isapostolic isoasarone isoascorbate isoascorbic acid isoasparagine isoaspartate isoaspartyl isoattenuate isoattenuation isoazimuthal isobacteriochlorin isobarometric isobaryonic isobase isobathytherm isobavachin isobenzofuran isobergapten isobifacial isobiflavonoid isobilateral isobioclimate isoboldine isoborneol isoboundary isobutadiene isobutamben isobutane isobutene isobutylene isobutyraldehyde isobutyrate isobutyric isocaloric isocalorific isocandela isocapacitary isocapnia isocapnic isocaproic isocaproic acid isocaproate isocaproaldehyde isocatabase isocatechin isocausal isocausality isocedrane isocellular isocenter isocentre isocentric isocentrically isocephalic isocephalism isocetane isocharge isochemical isochlorogenic acid isocholesterin isocholesterol isochorismate isochromane isochromanone isochromatic isochromatid isochromene isochromosomal isochromosome isochron isochronal isochrysene isocitral isocitrate isocitric isocitric acid isoclinal isocline isoclonal isocolchicide isocolchicinoid isocolic isocolloid isocolon isoconazole isoconfigurational isoconic isoconjugate isocontour isocortex isocortical isocost isocoumarin isocovariance Isocracking isocracy isocrat isocrotonic isocryptolepine isocryptomerin isocrystal isocrystalline isocurvature isocurve isocyanic isocyanic acid isocyanide isocyanoacetate isocyanuric isocyclic isodalbergin isodaucene isodecoder isodecyl isodemographic isodense isodensity isoderivative isodesmosine isodiabatic isodiametric isodiametrical isodiazene isodicentric isodichotomous isodichroic diisopropylphenol diisopropylphenyl isodimorphic isodimorphism isodimorphous isodipeptide isodiphasic isodirectional isodirectionality isodisomy isodisperse isodispersion isodistance isodop isodose isodoublet isodrome isodrosopterin isodual isodulcite isoduplication isodynamic isodynamical isoeccentric isoeccentrically isoechinulin isoecho isoechogenic

• anteiso-
• isohilbert space
• isoinner product
• isolatitude
• isolocal
• isomanifold
• isosymmetry
• isotransformation

Translations

[edit] equal

Finnish: iso- (fi) French: iso- (fr) Greek: ισο- (iso-) Irish: isi- Italian: iso- (it) Polish: izo- (pl) Portuguese: iso- Russian: изо- (ru) (izo-) Spanish: iso- (es)

See also

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• homeo-

Further reading

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• “iso-”, in Collins English Dictionary.
• “iso-”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “iso-”, in OneLook Dictionary Search.
• “iso-, comb. form”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.

Anagrams

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• I/Os, ios, OSI, SIO, soi, OIs, OIS, SOI, iOS, IOs, Ios

Catalan

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Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Prefix

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iso-

1. iso-

Derived terms

[edit] Catalan terms prefixed with iso- isòbar isoglossa isoterm isòtop isotropia

Finnish

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Etymology

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Internationalism; ultimately from Ancient Greek ἴσος (ísos, “equal”).

Pronunciation

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• IPA(key): /ˈiso-/, [ˈis̠o̞-]

Prefix

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iso-

1. (sciences, chemistry) iso-

Derived terms

[edit] Finnish terms prefixed with iso- (same) isobaari isoftaalihappo isohyeetti isohypsi isopleetti isotaksi isotermi isosyaanihappo isoviiva isovoihappo

See also

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• iso

Further reading

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• “2. iso-”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎[1] (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 1 January 2024

Anagrams

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• ois, soi

French

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Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Prefix

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iso-

1. iso-

Derived terms

[edit] French terms prefixed with iso- anisogame isobarométrique isobutane isobutène isodensité isoédrique isoélectrique isoeugénol isofonctionnel isogame isogamie isogénique isogéotherme isoglosse isologue isomère isométrique isométrie isonomie isopalmitique isopentane isopétale isophylle isopode isopropyle isoptère isoscédasticité isoscédastique isostémone isotherme

• isobare
• isobutane
• isochore
• isochrone
• isocline
• isogamme
• isooctane
• isopycne
• isotherme

Indonesian

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Alternative forms

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• is- (before a vowel)

Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Pronunciation

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• IPA(key): [ɪso]
• Hyphenation: iso

Prefix

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iso-

1. iso- Synonym: alo-

Derived terms

[edit] Category Indonesian terms prefixed with iso- not found

Further reading

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• “iso-”, in Kamus Besar Bahasa Indonesia [Great Dictionary of the Indonesian Language] (in Indonesian), Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016

Italian

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Alternative forms

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• is- (before a vowel)

Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Prefix

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iso-

1. iso-

Derived terms

[edit] Italian terms prefixed with iso- isoalino isobarico isobata isobutano isobutirrato isocianato isocianico isocromatico isocrono isodesmosina isodiametrico isodinamico isodinamismo isoenzima isoflavone isofrequenziale isogamete isogamia isogenesi isoglossa isoimmunizzazione isobara isochimena isoclina isoclinale isocora isodomico isogona isogonale isoieta isoipsa isotonia isomero isometrico isomorfico isomorfismo isomorfo isoosmotico isosmotico isopode isopropilico isosillabico isosillabismo isostasi isostatico isosterico isotattico isotermia isotermico isotropia isotropo isovalerico isovolemia

Anagrams

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• -osi, osi

Portuguese

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Alternative forms

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• is- (before a vowel)

Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Pronunciation

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• (Brazil) IPA(key): /ˌi.zo/

• (Portugal) IPA(key): /ˌi.zɔ/

• Hyphenation: i‧so-

Prefix

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iso-

1. iso- equi-

Derived terms

[edit] Portuguese terms prefixed with iso- isobárico isobarométrico isoleucina isomórfico isomorfo isotérmico isótropo

Further reading

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• “iso-”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2025
• “iso-”, in Dicionário infopédia da Lingua Portuguesa (in Portuguese), Porto: Porto Editora, 2003–2025
• “iso-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025

Spanish

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Alternative forms

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• is- (before a vowel)

Etymology

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Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Prefix

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iso-

1. iso- Synonym: equi-

Derived terms

[edit] Spanish terms prefixed with iso- isoleucina isometría isomórfico isomorfo isotrasplante isótropo

Further reading

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• “iso-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025