franc

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. See Table at currency.
2. n. The primary unit of currency in Belgium, France, Luxembourg, and Monaco before the adoption of the euro.

Century Dictionary and Cyclopedia

1. n. Either of two ancient coins in France: one, of gold (the franc à cheval, the obverse being a horseman), first coined by John the Good in 1360; the other, of silver, by Henry III. in 1575. The gold franc weighed about 60 grains, and was worth about half a guinea English. The specimen of the silver coin given in the cut weighs about 217 grains, and was worth about one third as much as the gold coin. This coin afterward fluctuated greatly in size and value, and was not minted after 1641, being replaced by the still older livre, but remained as a money of account.
2. n. A French silver coin and money of account which since 1795 has formed the unit of the French monetary system. It has also been adopted as the unit of currency by Switzerland and Belgium, and the lira of Italy, the drachma of Greece, the dinar of Servia, etc., have been made conformable to it. It is of the value of a little over 9½ d. English money, or about 19 United States cents, and is divided into 100 centimes.

Wiktionary

1. n. former unit of currency of France, Belgium and Luxembourg, replaced by the euro.
2. n. Any of several units of currency, some of which are multi-national (West African CFA Franc (XOF), Central African CFA Franc (XAF), the Swiss Franc (CHF)) while others are national currencies.

GNU Webster's 1913

1. n. A silver coin of France, and since 1795 the unit of the French monetary system. It has been adopted by Belgium and Swizerland. In 1913 it was equivalent to about nineteen cents American, or ten pence British, and is divided into 100 centimes.

WordNet 3.0

1. n. the basic monetary unit in many countries; equal to 100 centimes