noun. the 7th letter of the Greek alphabet.
- Greek alphabet
- alphabetic character
- letter of the alphabet
- ἦτα (Ancient Greek (to 1453))
noun. a terrorist organization organized in 1959 by student activists who were dissatisfied with the moderate nationalism of the traditional Basque party; want to create an independent homeland in Spain's western Pyrenees.
- Basque Fatherland and Liberty
- Euskadi ta Askatasuna
Sentences with eta
1. Noun, singular or mass
Efficiency is often denoted by the Greek letter eta (η), and is calculated using the following formula: