eta

¹ American  

[ey-tuh, ee-tuh] / ˈeɪ tə, ˈi tə /

noun

1. the seventh letter of the Greek alphabet (H, η).

2. the vowel sound represented by this letter.

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E.T.A. ² American  

Or ETA

abbreviation

1. estimated time of arrival.

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ETA ¹ British  

abbreviation

1. estimated time of arrival

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ETA ² British  

/ ˈɛtə /

acronym

1. Euzkadi ta Askatsuna: an organization of militant Basque nationalists attempting to gain independence for the Basques, esp those ruled by Spain, until a ceasefire in 1998, by means of guerrilla warfare

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eta ³ British  

/ ˈiːtə /

noun

1. the seventh letter in the Greek alphabet (Η, η), a long vowel sound, transliterated as e or ē

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eta ⁴ British  

/ ˈeɪtə /

noun

1. (in Japan, formerly) a member of a class of outcasts who did menial and dirty tasks

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Etymology

Origin of eta

< Greek êta; compare Hebrew ḥeth heth

Example Sentences

But other variants – eta, theta, iota – were quickly steamrolled and are now irrelevant.

From Seattle Times • Dec. 14, 2021

The importance of those men dressed in white is clearly shown by the symbol that looks like an H, the Greek letter eta.

From National Geographic

About one-thirtieth of the times that a pi meson hit a deuterium nucleus, out came the eta meson, which decays into three pions.

From Time Magazine Archive

Status Symbol The H on the men’s clothing is the Greek letter eta.

From National Geographic

In numbers other than eta the initial e is omitted in quick counting.

From Grammar and Vocabulary of the Lau Language, Solomon Islands by Ivens, W. G. (Walter George)