diadema

See also: Diadema and diademă

Catalan

Etymology

Borrowed from Latin diadēma, from Ancient Greek διάδημα (diádēma), from διαδέω (diadéō, “to bind around”).

Pronunciation

• IPA^(key): (Northern) [di.əˈðe̞.mə]
• IPA^(key): (Balearic) [di.əˈðe.mə]
• IPA^(key): (Central) [di.əˈðɛ.mə]
• IPA^(key): (Valencia, Northwestern) [di.aˈðe.ma]

Noun

diadema f (plural diademes)

1. diadem

Derived terms

• diademat

Further reading

• “diadema”, in Diccionari de la llengua catalana [Dictionary of the Catalan Language] (in Catalan), second edition, Institute of Catalan Studies [Catalan: Institut d'Estudis Catalans], April 2007
• “diadema”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2026
• “diadema” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
• Alcover, Antoni Maria; Moll, Francesc de Borja (1963), “diadema”, in Diccionari català-valencià-balear (in Catalan)

Galician

Etymology

From Latin diadēma, from Ancient Greek διάδημα (diádēma), from διαδέω (diadéō, “to bind around”).

Noun

diadema m (plural diademas)

1. diadem

Further reading

• “diadema”, in Dicionario da Real Academia Galega (in Galician), A Coruña: Royal Galician Academy, 2012–2026

Italian

Etymology

From Latin diadēma, from Ancient Greek διάδημα (diádēma), from διαδέω (diadéō, “to bind around”).

Pronunciation

• IPA^(key): /di.aˈdɛ.ma/, /djaˈdɛ.ma/
• Rhymes: -ɛma
• Hyphenation: di‧a‧dè‧ma, dia‧dè‧ma

Noun

diadema m (plural diademi)

1. diadem
2. tiara

Further reading

• “diadema”, in Vocabolario Treccani on line (in Italian), Istituto dell'Enciclopedia Italiana, 2026
• diadema in Luciano Canepari, Dizionario di Pronuncia Italiana (DiPI)

Latin

Etymology

From Koine Greek διάδημα (diádēma, “a decorative wreath-shaped headdress”), from Ancient Greek διαδέω (diadéō, “to encircle, bind, wrap around”) + -μα (-ma, result noun suffix).

Pronunciation 1

• (Classical Latin) IPA^(key): [di.aˈdeː.ma]
• (modern Italianate Ecclesiastical) IPA^(key): [di.aˈdɛː.ma]

Noun

diadēma n or f (genitive diadēmatis or diadēmatos or diadēmae); variously declined, third declension, first declension

2. diadem, crown, tiara; a royal headdress

Declension

Third-declension noun (neuter, imparisyllabic non-i-stem) or third-declension noun (Greek-type, normal variant, neuter, imparisyllabic non-i-stem) or first-declension noun.

	singular	plural
nominative	diadēma	diadēmata diadēmae
genitive	diadēmatis diadēmatos diadēmae	diadēmatum diadēmārum
dative	diadēmatī diadēmae	diadēmatibus diadēmīs
accusative	diadēma diadēmam	diadēmata diadēmās
ablative	diadēmate diadēmā	diadēmatibus diadēmīs
vocative	diadēma	diadēmata diadēmae

Descendants

• Catalan: diadema
• English: diadem
• French: diadème
• Galician: diadema
• Italian: diadema
• Portuguese: diadema
• Romanian: diademă
• Sicilian: diadema
• Spanish: diadema

Pronunciation 2

• (Classical Latin) IPA^(key): [di.aˈdeː.maː]
• (modern Italianate Ecclesiastical) IPA^(key): [di.aˈdɛː.ma]

Noun

diadēmā

1. ablative singular of diadēma f

References

• “diadema”, in Charlton T. Lewis and Charles Short (1879), A Latin Dictionary, Oxford: Clarendon Press
• “diadema”, in Charlton T. Lewis (1891), An Elementary Latin Dictionary, New York: Harper & Brothers
• "diadema", in Charles du Fresne du Cange, Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “diadema”, in Gaffiot, Félix (1934), Dictionnaire illustré latin-français, Hachette.
• “diadema”, in Harry Thurston Peck, editor (1898), Harper’s Dictionary of Classical Antiquities, New York: Harper & Brothers
• “diadema”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin

Portuguese

Etymology

Learned borrowing from Latin diadēma, from Ancient Greek διάδημα (diádēma), from διαδέω (diadéō, “to bind around”).

Pronunciation

• (Brazil) IPA^(key): /d͡ʒi.aˈdẽ.mɐ/, (faster) /d͡ʒjaˈdẽ.mɐ/

 

• (Portugal) IPA^(key): /di.ɐˈde.mɐ/ [di.ɐˈðe.mɐ], (faster) /djɐˈde.mɐ/ [djɐˈðe.mɐ]

• (Portugal) IPA^(key): /di.ɐˈde.mɐ/ [di.ɐˈðe.mɐ], (faster) /djɐˈde.mɐ/ [djɐˈðe.mɐ]
  • (Southern Portugal) IPA^(key): /di.ɐˈde.mɐ/, (faster) /djɐˈde.mɐ/

• Rhymes: -emɐ

Noun

diadema m (plural diademas)

1. diadem

Further reading

• “diadema”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026
• “diadema”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Romanian

Pronunciation

• IPA^(key): [di.aˈdema]

Noun

diadema f

1. definite nominative/accusative singular of diademă

Spanish

The Duchess of Angoulême's emerald-and-diamond tiara, made in 1820 and currently in the Louvre

A diadem

A halo

A headband

Etymology

From Latin diadēma, from Ancient Greek διάδημα (diádēma), from διαδέω (diadéō, “to bind around”).

Pronunciation

• IPA^(key): /djaˈdema/ [d̪jaˈð̞e.ma]
• Rhymes: -ema
• Syllabification: dia‧de‧ma

Noun

diadema f (plural diademas)

1. diadem, crown

   Synonym: corona

2. tiara (ornamental coronet)

   Synonym: tiara

3. halo, aureole, nimbus

   Synonym: aureola

4. headband

   Synonym: cintillo

Derived terms

• diademado

Further reading

• “diadema”, 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

Tagalog

Pronunciation

• (Standard Tagalog) IPA^(key): /diaˈdema/ [d͡ʒɐˈd̪ɛː.mɐ]
  • IPA^(key): (no palatal assimilation) /diaˈdema/ [d̪jɐˈd̪ɛː.mɐ]
• Rhymes: -ema
• Syllabification: di‧a‧de‧ma

Noun

diadema (Baybayin spelling ᜇᜒᜌᜇᜒᜋ)

1. dated spelling of diyadema