Main definitions of eta in English

: ETA1ETA2

ETA1

noun

  • Estimated time of arrival, in particular the time at which an aircraft or ship is expected to arrive at its destination.

Main definitions of eta in English

: ETA1ETA2

ETA2

proper noun

  • A Basque separatist movement in Spain, founded in 1959.

Origin

Basque acronym, from Euzkadi ta Azkatasuna Basque homeland and liberty.

Main definitions of eta in English

: ETA1ETA2

eta

noun

  • 1The seventh letter of the Greek alphabet (Η, η), transliterated as ‘e’ or ‘ē.’

    • ‘This complex contains eight different homologous subunits, alpha, beta, gamma, delta, epsilon, zeta, eta, and theta.’
    • ‘The squads had been organized into Alpha, Beta, Gamma, Delta, Epsilon, Zeta, Eta and Theta.’
    1. 1.1EtaAstronomy [followed by Latin genitive] The seventh star in a constellation.
      ‘Eta Carinae’
      • ‘This region, about 8000 light-years from Earth, is located near to the famous explosive variable star Eta Carinae, which lies just outside the field of view toward the upper right.’
      • ‘That galaxy is just a little more than one degree east of Eta Piscium.’
      • ‘The striking picture reveals an eclectic mix of embryonic stars living in the tattered neighborhood of one of the most famous massive stars in our Milky Way galaxy, Eta Carinae.’
      • ‘Researchers using NASA's Far Ultraviolet Spectroscopic Explorer satellite have made the first ever direct observation of Eta Carinae's companion star.’
      • ‘On the night of 10 September 1784, the English astronomer Edward Pigott noticed variations in the brightness of Eta Aquilae, a star lying in the constellation Aquila.’

Pronunciation:

eta

/ˈātə//ˈētə/