1. eu(n = noun.substance) atomic number 63, europium - a bivalent and trivalent metallic element of the rare earth group;
is a kind of metal, metallic element
2. eu(n = noun.group) common market, ec, eec, europe, european community, european economic community, european union - an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members; "he tried to take Britain into the Europen Union"
is a kind of global organization, international organisation, international organization, world organisation, world organization
the chemical symbol for Europium, an element with atomic number 63 and atomic weight 151.96. [PJC]
A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-. [1913 Webster]
eu, symb. Chem. the element europium.