# iso-
## English
### Etymology

From Ancient Greek ἴσος (ísos, “equal”).

### Pronunciation

* (General American) IPA: /aɪsoʊ-/
* Audio (US):(file)

### Prefix

iso-
* Same, identical.
    isoeffect, isointense
* Equal; equivalent.
    isorhythm
* (chemistry) Isomer.
    Isomethadone is an isomer of methadone.
* (organic chemistry) (of an aliphatic compound, especially a fatty acid) Having a branch on the penultimate carbon atom of a chain.
    isohexane
* (meteorology, geography) Forms terms for specific kinds of isolines.
    isotherm, isochrone
* (mathematics) Isomorphism.

#### Synonyms

* (identical): homo-, syn-/sym-, ipsi-
* (equivalent): equi-, pari-

#### Antonyms

* (antonym(s) of “identical”): hetero-, allo-
* (antonym(s) of “equivalent”): aniso-

#### Derived terms

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

#### See also

* (similar) homeo-

### Anagrams

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

## Finnish
### Pronunciation

* IPA: /ˈiso-/, [ˈis̠o̞-]

### Etymology 1

See iso (“big”).

#### Prefix

iso-
* grand- (of a generation once removed)

##### Further reading

* “1. iso-”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎ (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 2024-01-01

### Etymology 2

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

#### Prefix

iso-
* iso-

##### Further reading

* “2. iso-”, in Kielitoimiston sanakirja [Dictionary of Contemporary Finnish]‎ (in Finnish) (online dictionary, continuously updated), Kotimaisten kielten keskuksen verkkojulkaisuja 35, Helsinki: Kotimaisten kielten tutkimuskeskus (Institute for the Languages of Finland), 2004–, retrieved 2024-01-01

### Anagrams

* ois, soi

## French
### Etymology

Borrowed from Ancient Greek ἴσος (ísos, “equal”).

### Prefix

iso-
* iso-

#### Derived terms

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

## Indonesian
### Etymology

From Ancient Greek ἴσος (ísos, “equal”).

### Pronunciation

* IPA: [ɪso]
* Hyphenation: iso

### Prefix

iso-
* iso-
    Synonym: alo-

#### Alternative forms

* is-

#### Derived terms
### Further reading

* “iso-” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

## Italian
### Etymology

Borrowed from Ancient Greek ἴσος (ísos, “equal”).

### Prefix

iso-
* iso-

### Anagrams

* -osi, osi

## Portuguese
### Etymology

From Ancient Greek ἴσος (ísos, “equal”).

### Prefix

iso-
* iso-

#### Derived terms
### See also

* equi-

## Spanish
### Etymology

Borrowed from Ancient Greek ἴσος (ísos, “equal”).

### Prefix

iso-
* iso-
    Synonym: equi-

#### Derived terms
### Further reading

* “iso-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8, Royal Spanish Academy [Spanish: Real Academia Española], 2024 December 10