The ariary (sign: Ar; ISO 4217 code MGA) is the currency of Madagascar. It is subdivided into 5 iraimbilanja and is one of only two non-decimal currencies currently circulating (the other is the Mauritanian ouguiya). The names ariary and iraimbilanja derive from the pre-colonial currency, with ariary being the name for a silver dollar. Iraimbilanja means literally "one iron weight" and was the name of an old coin worth ⁄₅ of an ariary.