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Definition of Eta
1. 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. "In 1968 ETA launched a campaign of political assassinations of government officials"
Category relationships: Act Of Terrorism, Terrorism, Terrorist Act
Generic synonyms: Foreign Terrorist Organization, Fto, Terrorist Group, Terrorist Organization
Geographical relationships: Espana, Kingdom Of Spain, Spain
2. Noun. The 7th letter of the Greek alphabet.
Generic synonyms: Alphabetic Character, Letter, Letter Of The Alphabet
Definition of Eta
1. Initialism. Estimated time of arrival. ¹
2. Initialism. Euskadi Ta Askatasuna ¹
3. Initialism. (Internet slang) Edited to add. ¹
4. Noun. The seventh letter of the Modern Greek alphabet, the eighth in Old Greek. ¹
5. Noun. (particles) A kind of electrically neutral meson having zero spin and isospin. ¹
6. Noun. A social outcast in Japan who is subjected to menial work, making up a class or caste of such people. ¹
¹ Source: wiktionary.com
Definition of Eta
1. a Greek letter [n -S]
Medical Definition of Eta
1. The seventh letter of the Greek alphabet.1. In chemistry, denotes the position seven atoms from the carboxyl group or other primary functional group. 2. Symbol for viscosity. (05 Mar 2000)