delta

See also: DELTA and Delta

English

Ancient Greek Alphabet

← gamma		→ epsilon
Δ δ Ancient Greek: δέλτα
Wikipedia article on delta

Lena River delta (landform at the mouth of a river).

Etymology

From Ancient Greek δέλτα (délta).

• (river): from the triangular shape of the majuscule Greek letter delta Δ
• (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ

Pronunciation

• IPA^(key): /ˈdɛltə/, [ˈdɛɫtə]

• Audio (US)

  (file)

• Rhymes: -ɛltə

Noun

delta (plural deltas)

1. The fourth letter of the modern Greek alphabet Δ, δ.
2. A landform at the mouth of a river where it empties into a body of water.

   Nile Delta

3. The letter D in the ICAO spelling alphabet, which assigns words to letters of the alphabet.
4. (mathematics) The symbol Δ.
5. (computing, informal) A small but noticeable effect. Compare epsilon.

   This will slow the main code path down, but only by delta.

6. (computing) The set of differences between two versions of a file.

   When you update the file, the system will only save the deltas.

7. (physics, engineering) A change in a quantity, likely from "d" for "difference".

   ΔV - "delta vee"(change in velocity, used in rocketry and orbital mechanics)

8. (surveying) The angle subtended at the center of a circular arc.
9. A type of cargo bike that has one wheel in front and two in back.
10. (electrical, often attributive) The closed figure produced by connecting three coils or circuits successively, end for end, especially in a three-phase system.

    delta winding; delta connection; delta current

11. (finance) The rate of change in an option value with respect to the underlying asset's price.
12. (chemistry) A value in delta notation indicating the relative abundances of isotopes.
13. (US, military, U.S. Space Force) A military unit, nominally headed by a colonel, equivalent to a USAF operations wing, or an army regiment.
14. (astronomy) a star that is usually the fourth brightest of a constellation.

Synonyms

• (USSF): garrison (a support wing equivalent)

Hypernyms

• (measure of derivative price sensitivity): Greeks (includes list of coordinate terms)

Derived terms

• delta connection
• Delta County
• delta iron
• delta metal
• delta particle
• delta ray
• delta test
• delta-v
• delta wing

 

Translations

fourth letter of modern Greek alphabet

• Arabic: دِلْتَا‎ (ar) f (diltā), دِلْتَا‎ (ar) f (deltā)
• Asturian: delta (ast) f
• Bulgarian: де́лта f (délta)
• Catalan: delta (ca) f
• Chinese:

  Mandarin: 德爾塔 (zh), 德尔塔 (zh) (dé'ěrtǎ)

• Czech: delta (cs)
• Danish: delta (da) n
• Dutch: delta (nl) m or f
• Esperanto: delto (eo)
• Finnish: delta (fi)
• French: delta (fr) m
• Galician: delta (gl) m
• German: Delta (de) n
• Greek: δέλτα (el) n (délta)

  Ancient: δέλτα n (délta)

• Hebrew: דֶּלְתָּא‎ (he) f (délta)
• Hindi: डेल्टा m (ḍelṭā)
• Hungarian: delta (hu)
• Icelandic: delta n
• Interlingua: delta

• Japanese: デルタ (deruta)
• Korean: 델타 (ko) (delta)
• Latvian: delta f
• Malay: delta
• Maori: tēira
• Marathi: डेल्टा n (ḍelṭā)
• Norwegian:

  Bokmål: delta (no) m

  Nynorsk: delta m

• Polish: delta (pl) f
• Portuguese: delta (pt) m
• Romanian: delta (ro) m
• Russian: де́льта (ru) f (dɛ́lʹta)
• Slovene: delta (sl) f
• Spanish: delta (es) f
• Swedish: delta (sv) n
• Tagalog: delta
• Thai: เดลตา (deel-dtâa)
• Turkish: delta (tr)

landform at the mouth of a river

• Armenian: դելտա (hy) (delta)
• Asturian: delta (ast) m
• Bikol Central: sabang
• Bulgarian: де́лта f (délta)
• Catalan: delta (ca) f
• Cherokee: ᏧᏩᏓᎶᎣᏒᎯ (tsuwadaloosvhi)
• Chinese:

  Mandarin: 三角洲 (zh) (sānjiǎozhōu)

• Czech: delta (cs) f
• Danish: delta (da) n
• Dutch: delta (nl) m or f
• Esperanto: delto (eo)
• Finnish: suisto (fi)
• French: delta (fr)
• Galician: delta (gl) m
• Greek: δέλτα (el) n (délta)

  Ancient: δέλτα n (délta)

• Gujarati: મુખત્રિકોણ (mukhatrikoṇ)
• Hindi: मुखत्रिकोण (mukhatrikoṇ), त्रिभुज (hi) m (tribhuj), तिकोन (hi) (tikon)
• Hungarian: deltatorkolat (hu), delta (hu)
• Indonesian: kuala (id)

• Japanese: 三角州 (さんかくす, sankakusu)
• Kazakh: атырау (atıraw)
• Korean: 삼각주 (ko) (samgakju) (三角洲 (ko))
• Latvian: delta f
• Maori: pūwaiwaha
• Norwegian:

  Bokmål: delta (no) n

  Nynorsk: delta n

• Polish: delta (pl) f
• Portuguese: delta (pt) m
• Romanian: deltă (ro) f
• Russian: де́льта (ru) f (dɛ́lʹta)
• Sindhi: ٽِڪور (Tikor)
• Spanish: delta (es) m
• Swedish: delta (sv) n
• Tagalog: delta, sabangan
• Thai: ดินดอนสามเหลี่ยม (th) (din-dɔɔn-sǎam-lìiam), สามเหลี่ยมปากแม่น้ำ (sǎam-lìiam-bpàak-mɛ̂ɛ-náam), ดินดอนสามเหลี่ยมปากแม่น้ำ (din-dɔɔn-sǎam-lìiam-bpàak-mɛ̂ɛ-náam)
• Vietnamese: đồng bằng (vi) (垌平)

mathematical symbol Δ

• Dutch: delta (nl) f
• Esperanto: delto (eo)
• Finnish: delta (fi)
• French: delta (fr) m
• Greek: δέλτα (el) n (délta)
• Hindi: डेल्टा m (ḍelṭā)
• Marathi: डेल्टा (ḍelṭā)

• Polish: delta (pl) f
• Romanian: delta (ro) m
• Russian: де́льта (ru) f (dɛ́lʹta)
• Thai: เดลตา (deel-dtâa)

computing: small but noticeable effect

computing: set of differences between two versions of a file

• Finnish: muutos (fi)

surveying: angle at the center of a circular arc

• Finnish: keskuskulma

electric connection

• Irish: triantán (ga) m

• Polish: trójkąt (pl) m

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• German: ^{(please verify)} Delta (de)
• Icelandic: ^{(please verify)} delta n (1), ^{(please verify)} ós m (2), ^{(please verify)} árós m (2)
• Interlingua: delta (1, 2, 3)
• Serbo-Croatian: ^{(please verify)} ušće (sh) n

• Sindhi: ^{(please verify)} ٽِڪور‎ (sd) f (2), ^{(please verify)} ڊيلٽا‎ f (1,3,4)
• Slovene: delta f (1, 2)
• Vietnamese: ^{(please verify)} châu thổ (vi)

See also

• deltoid
• Appendix: IPA examples

Verb

delta (third-person singular simple present deltas, present participle deltaing, simple past and past participle deltaed)

1. (cryptography) This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.
   • 2007, B. J. Copeland, “Tunny and Colossus: Breaking the Lorenz Schlüsselzusatz traffic”, in Karl de Leeuw, Jan Bergstra, editors, The History of Information Security: A Comprehensive Handbook, Amsterdam: Elsevier, →ISBN, page 458:

     Turingery worked on deltaed key to produce the deltaed contribution of the chi-wheels. Turing's discovery that delta-ing would reveal information otherwise hidden was essential to the developments that followed.

2. (computing) This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.
   • 1992, Israel Silverberg, Source File Management With SCCS, Englewood Cliffs, NJ: Prentice Hall, →ISBN, page 166:

     The primary function of this command is to delta the product version file (if it has been retrieved for edit). However, prior to deltaing the product version file, the work source tree is searched to verify that no other source files are still waiting to be deltaed.

Anagrams

• Adlet, adlet, atled, dalet, dealt, lated, taled

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Asturian

Etymology

From Ancient Greek δέλτα (délta).

Noun

delta f (plural deltes)

1. delta (Greek letter)

Noun

delta m (plural deltes)

1. delta (landform at the mouth of a river)

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Catalan

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• (Balearic) IPA^(key): /ˈdəl.tə/
• (Central) IPA^(key): /ˈdɛl.tə/
• (Valencian) IPA^(key): /ˈdel.ta/

Noun

delta f (plural deltes)

1. delta; the Greek letter Δ (lowercase δ).
2. (geography) A delta.

Derived terms

• metall delta

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Czech

Greek letter

Δδ	Previous:	gama
	Next:	epsilon

Etymology 1

From Ancient Greek δέλτα (délta), which is probably of Semitic origin.

Noun

delta n (indeclinable)

1. Delta (Greek letter Δ).
2. (physics) Kind of rays consisting of secondary electrons with enough energy to escape a significant distance away from the primary radiation beam and produce further ionization (delta ray).
3. Having the shape of the Greek letter Δ.

   delta křídlo ― delta wing

Derived terms

• deltový

Etymology 2

From Ancient Greek δέλτα (délta). Originally used for the delta of the Nile, because its forked shape resembled the Greek letter Δ. The word is probably of Semitic origin.

Noun

delta f

1. (geography) delta (forked mouth of a river)

Declension

Declension

	singular	plural
nominative	delta	delty
genitive	delty	delt
dative	deltě	deltám
accusative	deltu	delty
vocative	delto	delty
locative	deltě	deltách
instrumental	deltou	deltami

Anagrams

• datel
• datle

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Danish

Etymology

From Ancient Greek δέλτα (délta).

Noun

delta n (singular definite deltaet, plural indefinite deltaer)

1. a river delta
2. delta (the fourth letter of the Greek alphabet, Δ, δ.)

Declension

Declension of delta

neuter gender	Singular		Plural
	indefinite	definite	indefinite	definite
nominative	delta	deltaet	deltaer	deltaerne
genitive	deltas	deltaets	deltaers	deltaernes

References

• “delta” in Den Danske Ordbog

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Dutch

Etymology

Ultimately from Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /ˈdɛl.taː/

• Audio

  (file)

• Hyphenation: del‧ta

Noun

delta f (plural delta's, diminutive deltaatje n)

1. The Greek letter delta.
2. A river delta, a network of one or more rivers and tributaries pouring out into a larger body of water.

   Synonym: rivierdelta

Hypernyms

• mond
• monding
• riviermond
• riviermonding

Coordinate terms

• estuarium

Derived terms

• deltagebied
• Deltagebied
• Deltaplan
• Deltawerk
• rivierdelta

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Finnish

Greek letter

Δδ	Previous:	gamma
	Next:	epsilon

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /ˈdelt(ː)ɑ/, [ˈde̞lt̪(ː)ɑ]
• Rhymes: -eltɑ
• Syllabification: del‧ta

Noun

delta

1. delta (Greek letter)

Declension

Inflection of delta (Kotus type 9/kala, no gradation)
nominative		delta	deltat
genitive		deltan	deltojen
partitive		deltaa	deltoja
illative		deltaan	deltoihin
		singular	plural
nominative		delta	deltat
accusative	nom.	delta	deltat
	gen.	deltan
genitive		deltan	deltojen deltainrare
partitive		deltaa	deltoja
inessive		deltassa	deltoissa
elative		deltasta	deltoista
illative		deltaan	deltoihin
adessive		deltalla	deltoilla
ablative		deltalta	deltoilta
allative		deltalle	deltoille
essive		deltana	deltoina
translative		deltaksi	deltoiksi
instructive		—	deltoin
abessive		deltatta	deltoitta
comitative		—	deltoineen

Possessive forms of delta (type kala)
possessor	singular	plural
1st person	deltani	deltamme
2nd person	deltasi	deltanne
3rd person	deltansa

Derived terms

• deltafunktio
• deltalihas
• deltasiipi

See also

• suisto

Anagrams

• dalet

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French

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /dɛl.ta/

• Audio

  (file)

Noun

delta m (plural delta or deltas)

1. delta (Greek letter)

Noun

delta m (plural deltas)

1. delta (geographical feature)

   Hypernym: embouchure

Further reading

• “delta” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

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Galician

Etymology

From Ancient Greek δέλτα (délta).

Noun

delta m (plural deltas)

1. delta (Greek letter)
2. delta (landform at the mouth of a river)

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Hungarian

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): [ˈdɛltɒ]
• Hyphenation: del‧ta

• Audio

  (file)

• Rhymes: -tɒ

Noun

delta (plural delták)

1. delta (Greek letter)
2. delta (landform at the mouth of a river)

Declension

Inflection (stem in long/high vowel, back harmony)
	singular	plural
nominative	delta	delták
accusative	deltát	deltákat
dative	deltának	deltáknak
instrumental	deltával	deltákkal
causal-final	deltáért	deltákért
translative	deltává	deltákká
terminative	deltáig	deltákig
essive-formal	deltaként	deltákként
essive-modal	—	—
inessive	deltában	deltákban
superessive	deltán	deltákon
adessive	deltánál	deltáknál
illative	deltába	deltákba
sublative	deltára	deltákra
allative	deltához	deltákhoz
elative	deltából	deltákból
delative	deltáról	deltákról
ablative	deltától	deltáktól
non-attributive possessive - singular	deltáé	deltáké
non-attributive possessive - plural	deltáéi	deltákéi

Possessive forms of delta
possessor	single possession	multiple possessions
1st person sing.	deltám	deltáim
2nd person sing.	deltád	deltáid
3rd person sing.	deltája	deltái
1st person plural	deltánk	deltáink
2nd person plural	deltátok	deltáitok
3rd person plural	deltájuk	deltáik

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Icelandic

Noun

delta f (genitive singular deltu, nominative plural deltur)

1. delta (Greek letter)

Declension

declension of delta

f-w1	singular		plural
	indefinite	definite	indefinite	definite
nominative	delta	deltan	deltur	delturnar
accusative	deltu	deltuna	deltur	delturnar
dative	deltu	deltunni	deltum	deltunum
genitive	deltu	deltunnar	delta	deltanna

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Indonesian

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): [ˈdɛlta]
• Hyphenation: dèl‧ta

Noun

delta

1. delta,
   1. The fourth letter of the modern Greek alphabet Δ, δ.
   2. (geography) A landform at the mouth of a river where it empties into a body of water.

Further reading

• “delta” in Kamus Besar Bahasa Indonesia (KBBI) Daring, Jakarta: Badan Pengembangan dan Pembinaan Bahasa, Kementerian Pendidikan dan Kebudayaan Republik Indonesia, 2016.

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Italian

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• Hyphenation: dèl‧ta
• Rhymes: -ɛlta

Noun

delta m (invariable)

1. delta (all senses)

Derived terms

• ala a delta
• deltaplano

Anagrams

• dalet

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Latvian

Noun

delta f (4th declension)

1. delta (Greek letter)
2. delta (landform at the mouth of a river)

Declension

Declension of delta (4th declension)

	singular (vienskaitlis)	plural (daudzskaitlis)
nominative (nominatīvs)	delta	deltas
accusative (akuzatīvs)	deltu	deltas
genitive (ģenitīvs)	deltas	deltu
dative (datīvs)	deltai	deltām
instrumental (instrumentālis)	deltu	deltām
locative (lokatīvs)	deltā	deltās
vocative (vokatīvs)	delta	deltas

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Norwegian Bokmål

Etymology 1

From Ancient Greek δέλτα (délta).

Noun

delta m (definite singular deltaen, indefinite plural deltaer, definite plural deltaene)

1. the Greek letter Δ, δ (delta)

Etymology 2

Noun

delta n (definite singular deltaet, indefinite plural delta or deltaer, definite plural deltaene)

1. a river delta

Derived terms

• elvedelta

Etymology 3

From del (“part”) + ta (“take”); i.e. to take (a) part in something; to partake in something

Verb

delta (imperative delta, present tense deltar, passive deltas, simple past deltok, past participle deltatt, present participle deltakende)

1. to participate; to partake

Related terms

• deltagelse, deltakelse
• deltager, deltaker

References

• “delta” in The Bokmål Dictionary.

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Norwegian Nynorsk

Etymology 1

From del (“part”) + ta (“take”); i.e. to take (a) part in something

Alternative forms

• deltaka, deltake (long forms)

Verb

delta (present tense deltek or deltar, past tense deltok, past participle delteke or deltatt, passive infinitive delteken, present participle deltakande, imperative delta)

1. to participate

Related terms

• deltakar

Etymology 2

From Ancient Greek δέλτα (délta).

Noun

delta m (definite singular deltaen, indefinite plural deltaer or deltaar, definite plural deltaene or deltaane)

2. the Greek letter Δ, δ (delta)

Etymology 3

A specialized use of delta (Etymology 2).

Noun

delta n (definite singular deltaet, indefinite plural delta, definite plural deltaa)

2. a river delta

Derived terms

• elvedelta

References

• “delta” in The Nynorsk Dictionary.

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Polish

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /ˈdɛl.ta/

• audio

  (file)

Noun

delta f

1. delta
2. (mathematics, colloquial) discriminant

Declension

Declension of delta

	singular	plural
nominative	delta	delty
genitive	delty	delt
dative	delcie	deltom
accusative	deltę	delty
instrumental	deltą	deltami
locative	delcie	deltach
vocative	delto	delty

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Portuguese

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): (Brazil) /ˈdɛw.tɐ/, [ˈdɛʊ̯.tɐ]

• IPA^(key): (Portugal) /ˈdɛl.tɐ/, [ˈdɛɫ.tɐ]

• Hyphenation: del‧ta

Noun

delta m (plural deltas)

1. delta (Greek letter)
2. delta (landform at the mouth of a river)

Derived terms

• asa-delta

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Serbo-Croatian

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /dêlta/
• Hyphenation: del‧ta

Noun

dȅlta f (Cyrillic spelling де̏лта)

1. delta, the Greek letter Δ, δ

Declension

Declension of delta

	singular	plural
nominative	dȅlta	delte
genitive	delte	dȇltā
dative	delti	deltama
accusative	deltu	delte
vocative	delto	delte
locative	delti	deltama
instrumental	deltom	deltama

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Spanish

Etymology

From Ancient Greek δέλτα (délta).

Pronunciation

• IPA^(key): /ˈdelta/, [ˈd̪el̪.t̪a]
• Hyphenation: del‧ta

Noun

delta f (plural deltas)

1. Greek letter delta

Derived terms

• ala delta

 

Noun

delta m (plural deltas)

1. (geography) a delta

Further reading

• “delta” in Diccionario de la lengua española, Vigésima tercera edición, Real Academia Española, 2014.

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Swedish

Etymology 1

From Ancient Greek δέλτα (délta).

Noun

delta n

1. the Greek letter Δ, δ (delta)
2. a river delta

Declension

Declension of delta
	Singular		Plural
	Indefinite	Definite	Indefinite	Definite
Nominative	delta	deltat	deltan	deltana
Genitive	deltas	deltats	deltans	deltanas

Etymology 2

From del (“part”) + ta(ga) (“take”); i.e. to take (a) part in something

Alternative forms

• deltaga (dated)

Pronunciation

• audio

  (file)

Verb

delta (present deltar, preterite deltog, supine deltagit, imperative delta)

1. to participate

Conjugation

Conjugation of delta (class 6 strong)

	Active		Passive
Infinitive	delta		—
Supine	deltagit		—
Imperative	delta		—
Imper. plural1	deltan		—
	Present	Past	Present	Past
Indicative	deltar	deltog	—	—
Ind. plural1	delta	deltogo	—	—
Subjunctive2	delta	deltoge	—	—
	Participles
Present participle	deltagande
Past participle	—
1 Archaic. 2 Dated. See the appendix on Swedish verbs.

Related terms

• deltagare

Anagrams

• delat, talde