[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. 1. estimated time of arrival. /ˈiːtə/ noun 1. the seventh letter in the Greek alphabet (Η, η), a long vowel sound, transliterated as e or ē /ˈeɪtə/ noun (pl) eta, […]
1. estimated time of arrival. abbreviation of estimated time (of) arrival, first attested 1939.
- Eta abstraction
[ey-tuh, ee-tuh] /ˈeɪ tə, ˈi tə/ noun, (used with a plural verb) Astronomy. 1. See under . [ak-wuh-rids, ah-kwuh-] /ˈæk wə rɪds, ˈɑ kwə-/ noun, (used with a plural verb) 1. either of two collections of meteors comprising meteor showers having their apparent origin in the constellation and visible either in early May (Eta Aquarids) […]