There are 3 main definitions of eta in English:

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eta1

Syllabification: e·ta
Pronunciation: /ˈātə, ˈētə
 
/

noun

1The seventh letter of the Greek alphabet (Η, η), transliterated as ‘e’ or ‘ē.’.
Example sentences
  • 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 (Eta) [followed by Latin genitive] Astronomy The seventh star in a constellation: Eta Carinae
More example sentences
  • 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.
  • 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.

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There are 3 main definitions of eta in English:

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ETA2

Syllabification: ETA
Pronunciation: /ˌēdēˈā
 
/

abbreviation

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

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There are 3 main definitions of eta in English:

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ETA3

Syllabification: ETA
Pronunciation: /ˈedə
 
/

Origin

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

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