Pus could not yet be seen under the skin, but this was already thickened and red over a surface the size of a franc.
It could be because cabernet franc, or cab franc as it is often called, is not the easiest wine to get to know.
British Dictionary definitions for franc
/fræŋk; French frɑ̃/
Also called French franc. the former standard monetary unit of France, most French dependencies, Andorra, and Monaco, divided into 100 centimes; replaced by the euro in 2002
the former standard monetary unit of Belgium (Belgian franc) and Luxembourg (Luxembourg franc), divided into 100 centimes; replaced by the euro in 2002
Also called Swiss franc. the standard monetary unit of Switzerland and Liechtenstein, divided into 100 centimes
Also called franc CFA, CFA franc, franc of the African financial community. the standard monetary unit, comprising 100 centimes, of the following countries: Benin, Burkina Faso, Cameroon, the Central African Republic, Chad, Congo-Brazzaville, Côte d'Ivoire, Equatorial Guinea, Gabon, Guinea-Bissau, Mali, Niger, Senegal, and Togo
the standard monetary unit of Burundi (Burundi franc), Comoros (Comorian franc), Democratic Republic of Congo (formerly Zaïre; Congolese franc), Djibouti (Djibouti franc), Guinea (Guinea franc), Madagascar (franc malgache), Rwanda (Rwanda franc), and French Polynesia and New Caledonia (French Pacific franc)
French coin, late 14c., from Medieval Latin Francorum Rex "King of the Franks," inscribed on gold coins first made during the reign of Jean le Bon (1350-64). An official monetary unit of France from 1795.