theta

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see also: Theta

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Pronunciation

• (British) IPA: /ˈθiːtə/
• (America) IPA: /ˈθeɪtə/

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.

Translations

• French: thêta
• German: Theta
• Portuguese: teta
• Russian: тэ́та
• Spanish: zeta, theta, tita

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Theta

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Noun

theta (plural thetas)

1. (US, colloquial) A member of the Kappa Alpha Theta sorority.

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