plural of Ruthenian

(mineralogy) Describing minerals containing ruthenium

A native or inhabitant of Ruthenia; a Ukrainian, a Belarusian, usually in a historical context.

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.

(historical) A descendent of the Old East Slavic language, a language used in the 15th to 18th centuries in the Grand Duchy of Lithuania and Cossack state, ancestor of Belarusian, Rusyn, and Ukrainian. It contrasts with the Middle Russian language or early modern Russian language of Muscovy.

Of or related to Old Ruthenia.