SOU

Sou (?), n.; pl. Sous (#) or (#). [[F. sou, OF. sol, from L. solidus a gold coin, in LL., a coin of less value. See Sold, n., Solid, and and cf. Sol, Soldo.]] An old French copper coin, equivalent in value to, and now displaced by, the five-centime piece (⅟₂₀ of a franc), which is popularly called a sou.