Smallest and now
defunct unit of currency in india.
100 paise = 1
rupee
6 paise = 1 anna.
hence 24 paise = 4 anna, but the one paise gets added usually, and a 25 paise coin is known as a charanna or a chavanni.
Therefore a 50 paise coin is known as an athanna, or an attanni, but the word has been
bastardised into adhanna, meaning half an anna, which does not make sense.
