A name given to the copper twenty Cash piece of Mysore, by Tipu Sul- tan, in 1792, after the adoption of his new system of reckoning. This system was be- gun in 1786, and was based on the Muludi, i.e., dating from the birth of the Prophet. The name is the Persian designation of the planet Venus.
Marsden (ii. 722) cites Buchanan, who calls this coin Jora, " perhaps according to the vulgar pronunciation of the first consonant in the Mysore country. "
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)