Any of various languages historically spoken in Ruthenia; West Russian, also known as Old Ukrainian, Old Belarusian and Rusian, any Old East Slavic descendant, which is different from Russian, Great Russian or "East Russian"

Of or related to Ruthenia.

plural of Ruthenian

(organic chemistry) An organoruthenium compound consisting of a ruthenium ion sandwiched in between two cyclopentadienyl rings.

plural of ruthenocene

An inorganic dye used in histology to stain aldehyde-fixed mucopolysaccharides

plural of ruthenium

(dated) The variety of Russian spoken in Little Russia.

plural of ruthenation

(organic chemistry) Any reaction in which a carbon-to-ruthenium bond is formed.