ruthenate

Century Dictionary and Cyclopedia

1. n. A salt which corresponds to the hypothetical ruthenic acid, as potassium ruthenate (K₂Ru-O₄); also formerly used for what is now called a perruthenate, as potassium perruthenate (KRuO₄). Sometimes written rutheniate.

Wiktionary

1. n. inorganic chemistry The oxyanion of ruthenium RuO42-; any salt or mineral containing this anion, formally derived from ruthenic acid