theta

 
Pronunciation: /ˈθiːtə/

noun

  • the eighth letter of the Greek alphabet (Θ, θ), transliterated as ‘th’.
  • (Theta) [followed by Latin genitive] Astronomy the eighth star in a constellation: Theta Draconis
  • [as modifier] Chemistry denoting a temperature at which a polymer solution behaves ideally as regards its osmotic pressure.

symbol

  • (θ) temperature (especially in degrees Celsius).
  • (θ) a plane angle.
  • (θ) a polar coordinate. Often coupled with φ (phi).

Origin:

Greek