theta

English Online Dictionary. What means theta‎? What does theta mean?

English

Etymology

Borrowed from Ancient Greek θῆτα (thêta).

Pronunciation

• (UK) IPA^(key): /ˈθiːtə/
• (US, Canada) IPA^(key): /ˈθeɪtə/
• (Hong Kong) IPA^(key): /ˈθeɪ.ta/, [fei̯˥ tʰaː˩]
• Rhymes: (UK) -iːtə, (US, Canada) -eɪtə

Noun

theta (plural thetas)

1. The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ.
2. (mathematics) The measure of an angle.
3. (aviation, by extension) Pitch angle; the angle between an aircraft's longitudinal axis and the horizontal plane.
4. (finance) The sensitivity of the value of a derivative with respect to time; the "time decay".
5. (biology) Designating a level of brain activity as measured by electroencephalography having a frequency of between four and seven cycles per second (associated with drowsiness in adults).
6. (phonology) The voiceless dental fricative represented by θ.

Hypernyms

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

Coordinate terms

(pitch angle of an aircraft):

• alpha
• beta
• gamma

Derived terms

Descendants

• → Malay: teta

Translations

Catalan

Etymology

Borrowed from Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): (Central, Balearic) [ˈtɛ.tə]
• IPA^(key): (Valencian) [ˈte.ta]

Noun

theta f (plural thetes)

1. theta; the Greek letter Θ (lowercase θ)

Further reading

• “theta” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
• “theta”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2024
• “theta” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.

Czech

Alternative forms

• théta

Etymology

Borrowed from Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): [ˈtxɛːta]
• IPA^(key): [ˈtɛːta]

Noun

theta n or f

1. theta (Greek letter)

Declension

when feminine:

Indeclinable when neuter.

Italian

Etymology

From the Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): /ˈtɛ.ta/
• Rhymes: -ɛta
• Hyphenation: thè‧ta

Noun

theta m or f (invariable)

1. theta (Greek letter)

References

Pali

Alternative forms

Adjective

theta

1. reliable
2. trustworthy

Polish

Etymology

Borrowed from Ancient Greek θῆτα (thêta), from Phoenician 𐤈 (ṭ‬ /⁠ṭēt⁠/).

Pronunciation

• IPA^(key): /ˈtɛ.ta/
• Rhymes: -ɛta
• Syllabification: the‧ta

Noun

theta f

1. theta (Greek letter Θ, θ)

Declension

Further reading

• theta in Polish dictionaries at PWN

Portuguese

Noun

theta f (plural thetas)

1. Pre-reform spelling (until Brazil 1943/Portugal 1911) of teta.

Spanish

Etymology

Borrowed from Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): /ˈteta/ [ˈt̪e.t̪a]
  • Rhymes: -eta
• IPA^(key): /ˈtita/ [ˈt̪i.t̪a]
  • Rhymes: -ita

Noun

theta f (plural thetas)

1. theta; the Greek letter Θ, θ

   Synonyms: zeta, tita