theta

See also: Theta, théta, thêta, and þeta

English

Ancient Greek Alphabet

← eta		→ iota
Θ θ Ancient Greek: θῆτα
Wikipedia article on theta

Etymology

Borrowed from Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): /ˈθiːtə/
• IPA^(key): /ˈθeɪtə/

• Audio (US):

  (file)

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. (finance) The sensitivity of the value of a derivative with respect to time; the "time decay".
4. (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).
   • 2018, Meghan O'Gieblyn, "The Most Unread Book Ever Acclaimed", The Paris Review, 19 September:

     The reader is less likely to throw the book down in a fit of disgust than she is to be lulled into a theta state, a highway hypnosis induced by page after page of incantatory prose.

5. (phonology) The voiceless dental fricative represented by θ.

Hypernyms

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

Derived terms

• theta wave
• thetan

Translations

Greek letter

• Arabic: ثِيتَا f (ṯītā)
• Aramaic: ܛܝܬܐ (ṯita)
• Armenian: թետա (tʻeta)
• Catalan: theta (ca) f
• Chinese:

  Mandarin: 西塔 (zh) (xītǎ)

• Danish: theta (da) n
• Dutch: thèta m or f
• Esperanto: teto (eo)
• Finnish: theeta (fi)
• French: thêta (fr) m
• Georgian: please add this translation if you can
• German: Theta (de) n
• Greek: θήτα (el) n (thíta)

  Ancient: θῆτα (thêta)

• (deprecated template usage) {{trans-mid}}
• Hebrew: טֵיתָא f (téta)
• Hungarian: théta
• Icelandic: þeta
• Interlingua: theta
• Japanese: テータ (tēta), シータ (shīta)
• Korean: 테타 (teta)
• Malay: teta
• Maori: heitā
• Portuguese: teta (pt) m
• Russian: тэ́та f (tɛ́ta)
• Spanish: zeta (es) f, theta f, tita (es) f
• Swedish: theta (sv)
• Tagalog: teta
• Turkish: teta
• Ukrainian: те́та f (téta)

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Catalan

Etymology

From the Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): (Central, Balearic) [ˈtɛ.tə]
• IPA^(key): (Valencia) [ˈtɛ.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.

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Czech

Alternative forms

• théta

Etymology

From the (deprecated template usage) [etyl] Ancient Greek θῆτα (thêta).

Noun

theta n

1. theta (Greek letter)

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Italian

Etymology

From the (deprecated template usage) [etyl] Ancient Greek θῆτα (thêta).

Noun

theta m or f (uncountable)

1. theta (Greek letter)

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Pali

Alternative forms

Alternative scripts

• 𑀣𑁂𑀢 (Brahmi script)
• थेत (Devanagari script)
• থেত (Bengali script)
• ථෙත (Sinhalese script)
• ထေတ (Burmese script)
• เถต or เถตะ (Thai script)
• ᨳᩮᨲ (Tai Tham script)
• ເຖຕ or ເຖຕະ (Lao script)
• ថេត (Khmer script)
• 𑄗𑄬𑄖 (Chakma script)

Adjective

theta

1. reliable
2. trustworthy

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Portuguese

Noun

theta f (plural s)

1. Template:pt-obsolete-hellenism

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Spanish

Etymology

From the (deprecated template usage) [etyl] Ancient Greek θῆτα (thêta).

Pronunciation

• IPA^(key): /ˈdeta/ [ˈd̪e.t̪a]

Noun

theta f (plural thetas)

1. theta; the Greek letter Θ, θ

Synonyms

• zeta
• tita