rutheniateChem.|ruːˈθiːnɪət| [f. ruthenium + -ate1 1 c.] = ruthenate. 1849D. Campbell Inorg.Chem. 255 The mass dissolved affords a solution of rutheniate of potash with an excess of potash.1877Nature 28 June 167/1 Saturating the rutheniate of potash with chlorine.