# tetra
## English
### Etymology

From translingual Tetragonopterus, an obsolete genus that included these fish, ultimately from Ancient Greek τετράγωνος (tetrágōnos, “square, quadrilateral”) + πτερόν (pterón, “wing, fin”).

### Pronunciation

* This entry needs pronunciation information. If you are familiar with the IPA or enPR then please add some!
* Audio (Southern England):(file)

### Noun

tetra (plural tetras)
* Any of numerous species of small freshwater fish of the South American family Characidae and West African family Alestidae, popular in home aquariums.
** 2018, Tim Flannery, Europe: A Natural History, page 32:Among them were ancient relatives of the piranhas and those popular aquarium fish the tetras, along with garfish and freshwater coelacanths, known as mawsonids.

#### Derived terms

* Adonis tetra (Lepidarchus adonis)
* African long-finned tetra (Bryconalestes longipinnis, syn. Brycinus longipinnis)
* African moon tetra (Bathyaethiops caudomaculatus)
* Arnold's tetra (Arnoldichthys spilopterus)
* banded tetra (Astyanax fasciatus)
* bandtail tetra (Moenkhausia dichroura)
* barred glass tetra (Phenagoniates macrolepis)
* beacon tetra (Hemigrammus ocellifer)
* Belgian flag tetra (Hyphessobrycon heterorhabdus)
* blackband tetra (Hyphessobrycon scholzei)
* black darter tetra (Poecilocharax weitzmani)
* blackedge tetra (Tyttocharax madeirae)
* black-flag tetra (Hyphessobrycon rosaceus)
* black-jacket tetra (Moenkhausia takasei)
* blackline tetra (Hyphessobrycon scholzei)
* black morpho tetra (Poecilocharax weitzmani)
* black neon tetra (Hyphessobrycon herbertaxelrodi)
* black phantom tetra (Hyphessobrycon megalopterus)
* black tetra (Gymnocorymbus thayeri, Gymnocorymbus ternetzi)
* black wedge tetra (Hemigrammus pulcher)
* bleeding heart tetra (Hyphessobrycon erythrostigma)
* bleeding heart tetra (Hyphessobrycon socolofi)
* blind tetra (Stygichthys typhlops)
* bloodfin tetra (Aphyocharax anisitsi)
* blue tetra (Boehlkea fredcochui, Knodus borki, Mimagoniates microlepis, Tyttocharax madeirae, et al.)
* brass tetra (Hemigrammus rodwayi)
* brilliant rummynose tetra (Hemigrammus bleheri)
* bucktooth tetra (Exodon paradoxus)
* Buenos Aires tetra (Hyphessobrycon anisitsi)
* butterfly tetra (Gymnocorymbus ternetzi)
* callistus tetra (Hyphessobrycon eques)
* calypso tetra (Hyphessobrycon axelrodi)
* cardinal tetra (Paracheirodon axelrodi)
* Carlana tetra (Carlana eigenmanni)
* central tetra (Astyanax aeneus)
* Cochu's blue tetra (Knodus borki)
* coffee-bean tetra (Hyphessobrycon takasei)
* Colcibolca tetra (Astyanax nasutus)
* Congo tetra (Phenacogrammus interruptus)
* copper tetra (Hasemania melanura)
* Costello tetra (Hemigrammus hyanuary)
* creek tetra (Bryconamericus scleroparius)
* creek tetra (Bryconamericus terrabensis)
* croaking tetra (Mimagoniates inequalis)
* croaking tetra (Mimagoniates lateralis)
* dawn tetra (Aphyocharax paraguayensis)
* dawn tetra (Hyphessobrycon eos)
* diamond tetra (Moenkhausia pittieri)
* discus tetra (Brachychalcinus orbicularis)
* disk tetra (Myleus schomburgkii)
* dragonfin tetra (Pseudocorynopoma doriae)
* ember tetra (Hyphessobrycon amandae)
* emperor tetra (Nematobrycon palmeri)
* false black tetra (Gymnocorymbus thayeri)
* false neon tetra (Paracheirodon simulans)
* false red nose tetra (Petitella georgiae)
* false rummynose tetra (Petitella georgiae)
* featherfin tetra (Hemigrammus unilineatus)
* firehead tetra (Hemigrammus bleheri)
* flag tetra (Hyphessobrycon heterorhabdus)
* flame tail tetra (Aphyocharax erythrurus)
* flame tetra (Hyphessobrycon flammeus)
* garnet tetra (Hemigrammus pulcher)
* glass bloodfin tetra (Prionobrama filigera)
* glass tetra (Moenkhausia oligolepis)
* glossy tetra (Moenkhausia oligolepis)
* glowlight tetra (Hemigrammus erythrozonus)
* goldencrown tetra (Aphyocharax alburnus)
* golden tetra (Hemigrammus rodwayi)
* goldspotted tetra (Hyphessobrycon griemi)
* gold-tailed tetra (Carlastyanax aurocaudatus)
* gold tetra (Hemigrammus rodwayi)
* green dwarf tetra (Odontocharacidium aphanes)
* green neon tetra (Paracheirodon simulans)
* green tetra (Paracheirodon simulans)
* Griem's tetra (Hyphessobrycon griemi)
* head & taillight tetra (Hemigrammus ocellifer)
* Hy511 tetra (Hyphessobrycon spp.)
* January tetra (Hemigrammus hyanuary)
* jellybean tetra (Lepidarchus adonis)
* jewel tetra (Hyphessobrycon eques)
* jumping tetra (Hemibrycon tridens)
* largespot tetra (Astyanax orthodus)
* lemon tetra (Hyphessobrycon pulchripinnis)
* long-finned glass tetra (Xenagoniates bondi)
* longfin tetra (Brycinus longipinnis)
* longjaw tetra (Bramocharax bransfordii)
* Loreto tetra (Hyphessobrycon loretoensis)
* Mayan tetra (Hyphessobrycon compressus)
* Mexican tetra (Astyanax mexicanus)
* mimic scale-eating tetra (Probolodus heterostomus)
* mourning tetra (Brycon pesu)
* naked tetra (Gymnocharacinus bergii)
* neon tetra (Paracheirodon innesi)
* Niger tetra (Arnoldichthys spilopterus)
* nurse tetra (Brycinus nurse)
* one-line tetra (Hemigrammus unilineatus)
* oneline tetra (Nannaethiops unitaeniatus)
* orangefin tetra (Bryconops affinis)
* ornate tetra (Hyphessobrycon bentosi)
* Panama tetra (Hyphessobrycon panamensis)
* penguin tetra (Thayeria boehlkei)
* Peruvian tetra (Hyphessobrycon peruvianus)
* petticoat tetra (Gymnocorymbus ternetzi)
* phantom tetra (Hyphessobrycon megalopterus)
* Pittier's tetra (Moenkhausia pittieri)
* pretty tetra (Hemigrammus pulcher)
* pristella tetra (Pristella maxillaris)
* pygmy tetra (Odontostilbe dialeptura)
* rainbow tetra (Nematobrycon lacortei)
* rainbow tetra (Nematobrycon palmeri)
* red eye tetra (Moenkhausia sanctaefilomenae)
* red-nose tetra
* red phantom Tetra (Hyphessobrycon sweglesi)
* redspotted tetra (Copeina guttata)
* red tetra (Hyphessobrycon flammeus)
* rosy-finned tetra (Hyphessobrycon rosaceus)
* rosy tetra (Hyphessobrycon bentosi)
* rosy tetra (Hyphessobrycon rosaceus)
* royal tetra (Inpaichthys kerri)
* ruby tetra (Axelrodia riesei)
* rummy-nose tetra (Hemigrammus rhodostomus (bleheri))
* sailfin tetra (Crenuchus spilurus)
* savage tetra (Hyphessobrycon savagei)
* savanna tetra (Hyphessobrycon stegemanni)
* semaphore tetra (Pterobrycon myrnae)
* serpae tetra (Hyphessobrycon eques)
* sharptooth tetra (Micralestes acutidens)
* silver tetra (Ctenobrycon spilurus)
* silver tetra (Gymnocorymbus thayeri)
* silver tetra (Micralestes acutidens)
* silvertip tetra (Hasemania melanura)
* silvertip tetra, silver-tipped tetra (Hasemania nana)
* splash tetra (Copella arnoldi)
* spotfin tetra (Hyphessobrycon socolofi)
* spottail tetra (Moenkhausia dichroura)
* spotted tetra (Copella nattereri)
* Swegles's tetra (Hyphessobrycon sweglesi)
* tailspot tetra (Bryconops caudomaculatus)
* tetra von Rio (Hyphessobrycon flammeus)
* three-lined African tetra (Neolebias trilineatus)
* Tietê tetra (Brycon insignis)
* Tortuguero tetra (Hyphessobrycon tortuguerae)
* transparent tetra (Charax gibbosus)
* true big-scale tetra (Brycinus macrolepidotus)
* Uruguay tetra (Cheirodon interruptus)
* white spot tetra (Aphyocharax paraguayensis)
* X-ray tetra
* x-ray tetra (Pristella maxillaris)
* yellow-tailed African tetra (Alestopetersius caudalis)
* yellow tetra (Hyphessobrycon bifasciatus)

#### Translations
### Anagrams

* Ratte, Treat, atter, ratte, tater, teart, treat

## Finnish
### Pronunciation

* IPA: /ˈtetrɑ/, [ˈt̪e̞t̪rɑ̝]
* Rhymes: -etrɑ
* Hyphenation: tet‧ra

### Etymology 1

< trademark Tetra Pak

#### Noun

tetra
* Tetra Pak (type of container)

##### Usage notes

* Often used as headword in a compound term, with a modifier that specifies the content, e.g. mehutetra (“Tetra Pak of juice”).

##### Declension

Possessive forms of tetra (Kotus type 9/kala, no gradation) :
first-person singular possessor
singular
plural
nominative
tetrani
tetrani
accusative
nom.
tetrani
tetrani
gen.
tetrani
genitive
tetrani
tetrojeni tetraini $^{rare}$
partitive
tetraani
tetrojani
inessive
tetrassani
tetroissani
elative
tetrastani
tetroistani
illative
tetraani
tetroihini
adessive
tetrallani
tetroillani
ablative
tetraltani
tetroiltani
allative
tetralleni
tetroilleni
essive
tetranani
tetroinani
translative
tetrakseni
tetroikseni
abessive
tetrattani
tetroittani
instructive
comitative
—tetroineni
second-person singular possessor
singular
plural
nominative
tetrasi
tetrasi
accusative
nom.
tetrasi
tetrasi
gen.
tetrasi
genitive
tetrasi
tetrojesi tetraisi $^{rare}$
partitive
tetraasi
tetrojasi
inessive
tetrassasi
tetroissasi
elative
tetrastasi
tetroistasi
illative
tetraasi
tetroihisi
adessive
tetrallasi
tetroillasi
ablative
tetraltasi
tetroiltasi
allative
tetrallesi
tetroillesi
essive
tetranasi
tetroinasi
translative
tetraksesi
tetroiksesi
abessive
tetrattasi
tetroittasi
instructive
comitative
—tetroinesi
first-person plural possessor
singular
plural
nominative
tetramme
tetramme
accusative
nom.
tetramme
tetramme
gen.
tetramme
genitive
tetramme
tetrojemme tetraimme $^{rare}$
partitive
tetraamme
tetrojamme
inessive
tetrassamme
tetroissamme
elative
tetrastamme
tetroistamme
illative
tetraamme
tetroihimme
adessive
tetrallamme
tetroillamme
ablative
tetraltamme
tetroiltamme
allative
tetrallemme
tetroillemme
essive
tetranamme
tetroinamme
translative
tetraksemme
tetroiksemme
abessive
tetrattamme
tetroittamme
instructive
comitative
—tetroinemme
second-person plural possessor
singular
plural
nominative
tetranne
tetranne
accusative
nom.
tetranne
tetranne
gen.
tetranne
genitive
tetranne
tetrojenne tetrainne $^{rare}$
partitive
tetraanne
tetrojanne
inessive
tetrassanne
tetroissanne
elative
tetrastanne
tetroistanne
illative
tetraanne
tetroihinne
adessive
tetrallanne
tetroillanne
ablative
tetraltanne
tetroiltanne
allative
tetrallenne
tetroillenne
essive
tetrananne
tetroinanne
translative
tetraksenne
tetroiksenne
abessive
tetrattanne
tetroittanne
instructive
comitative
—tetroinenne
third-person possessor
singular
plural
nominative
tetransa
tetransa
accusative
nom.
tetransa
tetransa
gen.
tetransa
genitive
tetransa
tetrojensa tetrainsa $^{rare}$
partitive
tetraansa
tetrojaan tetrojansa
inessive
tetrassaan tetrassansa
tetroissaan tetroissansa
elative
tetrastaan tetrastansa
tetroistaan tetroistansa
illative
tetraansa
tetroihinsa
adessive
tetrallaan tetrallansa
tetroillaan tetroillansa
ablative
tetraltaan tetraltansa
tetroiltaan tetroiltansa
allative
tetralleen tetrallensa
tetroilleen tetroillensa
essive
tetranaan tetranansa
tetroinaan tetroinansa
translative
tetrakseen tetraksensa
tetroikseen tetroiksensa
abessive
tetrattaan tetrattansa
tetroittaan tetroittansa
instructive
comitative
—tetroineen tetroinensa :

##### Synonyms

* tetrapakkaus

##### Derived terms

* tetrapakkaus

### Etymology 2

From English tetra, from taxonomic name Tetragonopterus.

#### Noun

tetra
* tetra (fish of the family Characidae, commonly kept as aquarium fish)

##### Declension

Possessive forms of tetra (Kotus type 9/kala, no gradation) :
first-person singular possessor
singular
plural
nominative
tetrani
tetrani
accusative
nom.
tetrani
tetrani
gen.
tetrani
genitive
tetrani
tetrojeni tetraini $^{rare}$
partitive
tetraani
tetrojani
inessive
tetrassani
tetroissani
elative
tetrastani
tetroistani
illative
tetraani
tetroihini
adessive
tetrallani
tetroillani
ablative
tetraltani
tetroiltani
allative
tetralleni
tetroilleni
essive
tetranani
tetroinani
translative
tetrakseni
tetroikseni
abessive
tetrattani
tetroittani
instructive
comitative
—tetroineni
second-person singular possessor
singular
plural
nominative
tetrasi
tetrasi
accusative
nom.
tetrasi
tetrasi
gen.
tetrasi
genitive
tetrasi
tetrojesi tetraisi $^{rare}$
partitive
tetraasi
tetrojasi
inessive
tetrassasi
tetroissasi
elative
tetrastasi
tetroistasi
illative
tetraasi
tetroihisi
adessive
tetrallasi
tetroillasi
ablative
tetraltasi
tetroiltasi
allative
tetrallesi
tetroillesi
essive
tetranasi
tetroinasi
translative
tetraksesi
tetroiksesi
abessive
tetrattasi
tetroittasi
instructive
comitative
—tetroinesi
first-person plural possessor
singular
plural
nominative
tetramme
tetramme
accusative
nom.
tetramme
tetramme
gen.
tetramme
genitive
tetramme
tetrojemme tetraimme $^{rare}$
partitive
tetraamme
tetrojamme
inessive
tetrassamme
tetroissamme
elative
tetrastamme
tetroistamme
illative
tetraamme
tetroihimme
adessive
tetrallamme
tetroillamme
ablative
tetraltamme
tetroiltamme
allative
tetrallemme
tetroillemme
essive
tetranamme
tetroinamme
translative
tetraksemme
tetroiksemme
abessive
tetrattamme
tetroittamme
instructive
comitative
—tetroinemme
second-person plural possessor
singular
plural
nominative
tetranne
tetranne
accusative
nom.
tetranne
tetranne
gen.
tetranne
genitive
tetranne
tetrojenne tetrainne $^{rare}$
partitive
tetraanne
tetrojanne
inessive
tetrassanne
tetroissanne
elative
tetrastanne
tetroistanne
illative
tetraanne
tetroihinne
adessive
tetrallanne
tetroillanne
ablative
tetraltanne
tetroiltanne
allative
tetrallenne
tetroillenne
essive
tetrananne
tetroinanne
translative
tetraksenne
tetroiksenne
abessive
tetrattanne
tetroittanne
instructive
comitative
—tetroinenne
third-person possessor
singular
plural
nominative
tetransa
tetransa
accusative
nom.
tetransa
tetransa
gen.
tetransa
genitive
tetransa
tetrojensa tetrainsa $^{rare}$
partitive
tetraansa
tetrojaan tetrojansa
inessive
tetrassaan tetrassansa
tetroissaan tetroissansa
elative
tetrastaan tetrastansa
tetroistaan tetroistansa
illative
tetraansa
tetroihinsa
adessive
tetrallaan tetrallansa
tetroillaan tetroillansa
ablative
tetraltaan tetraltansa
tetroiltaan tetroiltansa
allative
tetralleen tetrallensa
tetroilleen tetroillensa
essive
tetranaan tetranansa
tetroinaan tetroinansa
translative
tetrakseen tetraksensa
tetroikseen tetroiksensa
abessive
tetrattaan tetrattansa
tetroittaan tetroittansa
instructive
comitative
—tetroineen tetroinensa :

##### Derived terms

* kardinaalitetra
* keisaritetra
* keltalyhtytetra
* kerritetra
* kirsikkatetra
* kolumbiantetra
* kongontetra
* korutetra
* kulmatetra
* lasitetra
* lipputetra
* lyhtytetra
* musta-aavetetra
* mustatetra
* neontetra
* puna-aavetetra
* punaevätetra
* punatetra
* rubiinitetra
* safiiritetra
* timanttitetra

### Further reading

* “tetra”, 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

* terat

## Italian
### Pronunciation

* IPA: /ˈtɛ.tra/
* Rhymes: -ɛtra
* Hyphenation: tè‧tra

### Adjective

tetra
* feminine singular of tetro

### Noun

tetra m (invariable)
* tetra ((fish))

### Anagrams

* retta

## Latin
### Adjective

tētra
* inflection of tēter:
** nominative/vocative feminine singular
** nominative/accusative/vocative neuter plural

### Adjective

tētrā
* ablative feminine singular of tēter

### References

* "tetra", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)

## Polish
### Pronunciation

* IPA: /ˈtɛ.tra/
* Audio:(file)
* Rhymes: -ɛtra
* Syllabification: te‧tra

### Etymology 1

Learned borrowing from Ancient Greek τετρα- (tetra-).

#### Noun

tetra f
* terry (fabric)
* (colloquial) Clipping of tetrachlorometan.

##### Derived terms

* tetrowy

### Etymology 2

Borrowed from English tetra.

#### Noun

tetra f
* tetra (fish)

##### Declension
### Further reading

* tetra in Wielki słownik języka polskiego, Instytut Języka Polskiego PAN
* tetra in Polish dictionaries at PWN