DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   ETA
       n 1: 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" [syn: Basque Homeland and Freedom,
            Basque Fatherland and Liberty, Euskadi ta Askatasuna,
            ETA]
       2: the 7th letter of the Greek alphabet