tetra-

From Ancient Greek τετρα- (tetra-).

tetra-

1. four

• tetr- (before a vowel)

From Ancient Greek τετρα- (tetra-), combining form of Ancient Greek τέτταρες (téttares), from τέσσαρες (téssares, “four”).

• IPA^(key): /ˈtɛtɹə/

• Audio (Southern England):

  (file)

tetra-

1. Four.

   Synonyms: tessara-; quadri- (Latin-derived counterpart)

   • 2006, Thomas Pynchon, Against the Day, Vintage 2007, p. 665: [cf. -latry]

     Which is how Kit first heard about the T.W.I.T. back in London, and of the ghostly neo-Pythagorean cult of tetralatry or worship of the number four, currently the rage in certain European circles

• Thesaurus:number

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

From Ancient Greek τέτταρες (téttares), τέσσαρες (téssares, “four”).

tetra-

1. tetra-

• “tetra-”, 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
• “tetra-”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2025
• “tetra-” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
• “tetra-” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

Internationalism (see English tetra-), ultimately from Ancient Greek τετρα- (tetra-).

• IPA^(key): /ˈtetrɑ-/, [ˈt̪e̞t̪rɑ̝-]

tetra-

1. (in loanwords or chemistry) tetra-

The prefix tetra- is mainly used in the names of chemical compounds or in words that have been loaned from other languages with the tri- prefix already there. For other words, the prefix neli-, which is derived from the Finnish word neljä (“four”) is preferred.

• tetr- (before a vowel)

From Ancient Greek τέτταρες (téttares), τέσσαρες (téssares, “four”).

tetra-

1. tetra-

   Synonym: quadri-

• tetracordo
• tetrade
• tetrapode
• tetrarca
• tetrastico

• retta

From Ancient Greek τετρα- (tetra-).

• IPA^(key): /tɛ.tra/

• Audio:

  (file)

• Rhymes: -ɛtra
• Syllabification: [please specify syllabification manually]

tetra-

1. tetra-

   ‎tetra- + ‎-logia → ‎tetralogia

• tetra- in Polish dictionaries at PWN

From Ancient Greek τέτταρες (téttares), τέσσαρες (téssares, “four”).

tetra-

1. tetra-

• “tetra-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2025

tetra-

1. tetra-

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