2 definitions found From WordNet (r) 2.0 [wn]: Ru noun: a rare polyvalent metallic element of the platinum group; it is found associated with platinum [syn: {ruthenium}, {atomic number 44}] From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]: ru The {country code} for the Russian Federation. (1999-01-27)

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