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Pronunciation: ru-the'ne-um

Definition: A metallic element of the platinum group; atomic no. 44, atomic wt. 101.07; 106Ru, with a half-life of 1.020 years, has been used in the treatment of certain eye problems.

[Mediev. L. Ruthenia, Russia, where first obtained]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.