A gold coin of the Ottoman Empire and the fourth pari, of the Funduk, though it also passes in circulation for the third part of a Zer-mahbub. Its weight is about thirteen and a half grains, and its name is derived from reba, a fourth part.
The silver Rebia, also known as the Onlik, is of the value of ten Paras or the fourth part of a Piastre. It weighs from fifty to seventy grains. Since the readjustment of the Turkish currency, the Onlik of the modern coinage is equal to nine and one one quarter Piastres.
See Also: Rebia
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)