Eu A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-.
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Eu
n 1: a bivalent and trivalent metallic element of the rare earth
group [syn: europium, atomic number 63]
2: an international organization of European countries formed
after World War II to reduce trade barriers and increase
cooperation among its members; "he took Britain into
Europe" [syn: European Union, European Community, EC,
European Economic Community, EEC, Common Market, Europe]