Meaning of ruthenium

ru•the•ni•um

Pronunciation: (r-thē'nē-um, -thēn'yum), [key]
— n. Chem.
  1. a steel-gray, rare metallic element, belonging to the platinum group of metals. Symbol: Ru; at. wt.: 101.07; at. no.: 44; sp. gr.: 12.2 at 20°C.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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