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/, /ˈθitə/
- (Hong Kong) IPA(key): /ˈθeɪ.ta/, [fei̯˥ tʰaː˩]
- Rhymes: -iːtə, -eɪtə
Noun
theta (plural thetas)
- The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ.
- (mathematics) The measure of an angle.
- (aviation, by extension) Pitch angle; the angle between an aircraft's longitudinal axis and the horizontal plane.
- Synonym: deck angle
- (finance) The sensitivity of the value of a derivative with respect to time; the "time decay".
- (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).
- (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
See also
- (Greek-script letter names) alpha, beta, gamma, delta, epsilon, zeta, eta, theta, iota, kappa, lambda, mu, nu, xi, omicron, pi, rho, sigma, tau, upsilon, phi, chi, psi, omega
Catalan
Etymology
Borrowed from Ancient Greek θῆτα (thêta).
Pronunciation
- IPA(key): (Central, Balearic) [ˈtɛ.tə]
- IPA(key): (Valencia) [ˈte.ta]
Noun
theta f (plural thetes)
- 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, 2025
- “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
- 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)
- theta (Greek letter)
References
Pali
Alternative forms
Adjective
theta
- reliable
- trustworthy
Polish
Etymology
Learned borrowing from Ancient Greek θῆτα (thêta), from Phoenician 𐤈 (ṭ /ṭēt/).
Pronunciation
- IPA(key): /ˈtɛ.ta/
- Rhymes: -ɛta
- Syllabification: the‧ta
Noun
theta f
- theta (Greek letter Θ, θ)
Declension
Further reading
- theta in Polish dictionaries at PWN
Portuguese
Noun
theta f (plural thetas)
- Pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) 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)
- theta; the Greek letter Θ, θ
- Synonyms: zeta, tita