/rooh"beuhl/ , n.
a silver or copper-alloy coin and monetary unit of Russia, the Soviet Union, and its successor states, equal to 100 kopecks.
Also, rouble .
[ 1545-55; rubl'; ORuss rubli lit., stump, plug, deriv. of rubiti to chop; prob. orig. denoting a piece cut from a silver bar, or a bar notched for division into smaller pieces ]