δέλτα

Forms

δέλτᾰ (délta) n (indeclinable)^[1]

Etymology

It is borrowed from Phoenician 𐤃 (d), the Phoenician letter whose name the Greeks took over with it.^[1] Beekes, Frisk and Chantraine all derive the name from Semitic and compare Biblical Hebrew דָּלֶת (dāleṯ), the name of the fourth Hebrew letter, which properly means “door”.^[2][3][4] Rosół lists the same letter name in Aramaic, Syriac and Arabic and notes that it was originally a noun for “door”, as in Akkadian daltu.^[5] Babiniotis adds that the shape of the letter in archaic inscriptions bears this meaning out.^[6]

The Greek form shows a metathesis: Rosół starts from a form like *δέλατ (*délat), which became δέλτα.^[5] The ⟨ε⟩ against Semitic /a/ has been put down to the influence of δέλτος (déltos, “writing tablet”), or to a Phoenician change of /a/ to /e/.^[5]

Among the explanations of the letter's name in the Byzantine lexicon of Zonaras is one that takes it from the triangle of stars.^[7]

Earliest recorded meaning

Among the earliest records, the tragedian Achaeus and Democritus use it as the name of the letter,^[8][5] and Democritus even has a genitive δέλτατος, though the word is otherwise indeclinable.^[8][3][9] In the same century Herodotus applies it to the triangular land at the mouths of the Nile.^[9][4]

Semantic evolution

From the letter the word passed to anything shaped like Δ: above all the delta of a river, first of the Nile in Herodotus and later of the Indus in Strabo and Arrian.^[9][4][3] Aristophanes uses it in the Lysistrata of a woman's trimmed pubic hair.^[10][8][4] Ptolemy uses it for the constellation Triangulum,^[8][11] and a late lexicon gives it as a name of the pediment of a building.^[8] Derivatives are δελτωτός (deltōtós) “shaped like a delta” in Aratus and δελτοειδής (deltoeidḗs) in Galen, the source of French deltoïde.^[4][3]

In Byzantine church usage the “mystic delta” was the triangle surrounded by rays in which the eye of God or the Hebrew name of God is painted.^[11] Modern Greek δέλτα (délta) is a learned continuation, the name of the letter and of a river delta; it also names an alloy used for ships' propellers.^[12][11]

Timeline

• 5th century BC – The tragedian Achaeus and Democritus use it as the name of the letter, and Herodotus uses it for the Nile delta.^[8][9]
• 5th–4th century BC – Aristophanes uses it figuratively in the Lysistrata, and Plato names the letter in the Cratylus.^[10][13]
• 1st century BC to 1st century AD – Strabo applies it to the delta of the Indus.^[9]
• 2nd century AD – Ptolemy uses it for the constellation Triangulum, and Arrian writes of the Indus delta.^[8][9]
• Byzantine period – Church usage gives the “mystic delta”, a rayed triangle with the eye or the name of God.^[11]
• Modern Greek – The learned word δέλτα (délta) names the letter and a river delta.^[12]

Meanings

Noun

1. Delta, the fourth letter of the Greek alphabet.^[9][10][8]
2. Anything shaped like a Δ, especially the triangular land at the mouths of a large river, such as the Nile or the Indus.^[9][14]
3. (Aristophanes) The female pubis; as an adverbial accusative, “trimmed into a triangle”.^[10][8]
4. (astronomy) The constellation Triangulum.^[8][9]
5. (architecture) A pediment.^[8]

Word family

• δελτοειδής (deltoeidḗs)
• δελτωτός (deltōtós)

Related words

• δέλτος (déltos)
• English delta

References

1. ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ Beekes, Robert S. P. (2010), Etymological Dictionary of Greek, with the assistance of Lucien van Beek, Leiden Indo-European Etymological Dictionary Series 10, Leiden; Boston: Brill
3. ^ a b c d Frisk, Hjalmar (1960–1972), Griechisches etymologisches Wörterbuch, 3 vols, Heidelberg: Carl Winter
4. ^ a b c d e Chantraine, Pierre (2009), Dictionnaire étymologique de la langue grecque: histoire des mots, new ed. with a supplement (Chroniques d'étymologie grecque 1–10), Paris: Klincksieck
5. ^ a b c d Rosół, Rafał (2013), Frühe semitische Lehnwörter im Griechischen, Frankfurt am Main: Peter Lang
6. ^ Babiniotis, Georgios (2010), Ετυμολογικό λεξικό της νέας ελληνικής γλώσσας [Etymological Dictionary of Modern Greek], Athens: Κέντρο Λεξικολογίας
7. ^ Pseudo-Zonaras, Lexicon, ed. Johann August Heinrich Tittmann (1808), Iohannis Zonarae Lexicon, Leipzig: Crusius
8. ^ a b c d e f g h i j k Rodríguez Adrados, Francisco, et al., eds. (1980–), Diccionario Griego-Español, Madrid: CSIC, http://dge.cchs.csic.es/xdge
9. ^ a b c d e f g h i Liddell, Henry George; Scott, Robert; Jones, Henry Stuart (1940), A Greek-English Lexicon, 9th ed., Oxford: Clarendon Press
10. ^ a b c d Diggle, James, et al., eds. (2021), The Cambridge Greek Lexicon, Cambridge: Cambridge University Press
11. ^ a b c d Πάπυρος–Larousse–Britannica, Μέγα Λεξικό της Ελληνικής Γλώσσας, Athens: Πάπυρος
12. ^ a b Ινστιτούτο Νεοελληνικών Σπουδών (Ίδρυμα Μανόλη Τριανταφυλλίδη) (1998), Λεξικό της κοινής νεοελληνικής, Thessaloniki: Aristotle University of Thessaloniki
13. ^ Keersmaekers, Alek (2021–2025), GLAUx: The Greek Language Automated corpus, https://github.com/alekkeersmaekers/glaux
14. ^ Korinthios, J. (2025), Grande Dizionario Greco Classico: Greco–Italiano, digital ed., Milan: Hoepli