Eta
|E-ta|
C1
🇺🇸
/ˈeɪtə/
🇬🇧
/ˈiːtə/
Greek letter
Etymology
Etymology Information
'Eta' originates from Greek, specifically the letter 'Η', where it was used as the seventh letter of the Greek alphabet.
Historical Evolution
'Η' transformed into the Latin alphabet as 'H', and eventually became the modern English representation 'Eta' for the Greek letter.
Meaning Changes
Initially, it meant 'the seventh letter of the Greek alphabet', and this meaning has largely remained the same in modern usage.
Meanings by Part of Speech
Noun 1
the seventh letter of the Greek alphabet (Η, η).
Eta is often used in mathematical equations.
Noun 2
a measure of efficiency, often used in physics and engineering.
The eta of the engine was calculated to be 0.85.
Last updated: 2025/07/02 06:40