Ruble n. (Written also rouble) The unit of monetary value in Russia. It is divided into 100 copecks, and in the gold coin of the realm (as in the five and ten ruble pieces) is worth about 77 cents. The silver ruble is a coin worth about 60 cents.
... took a small earthenware jar from a side shelf, dusted it carefully and placed it upon the mantel. From a knotted cloth about her neck she took a ruble and dropped the coin into the jar. Big Ivan ... — Americans All - Stories of American Life of To-Day • Various