Wordnet 3.0
NOUN (1)
1.
the basic unit of money in Russia;
[syn: ruble, rouble]
The Collaborative International Dictionary of English v.0.48:
Rouble \Rou"ble\, n.
A coin. See Ruble.
[1913 Webster]
WordNet (r) 3.0 (2006):
rouble
n 1: the basic unit of money in Russia [syn: ruble, rouble]