Solidus

Solidus, a Roman gold coin adopted by the Franks, and first coined by them in gold, but subsequently in silver, when it was equivalent to one-twentieth of the libra, or pound; as the “sol” or “sou” it depreciated greatly in value; was minted in copper, and on the introduction of the decimal system its place was taken by a five-centime piece; the “soldo” in Italy, and the Solidus L.S.D. owe their origin to this coin.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Solidarity * Solingen
Solar Myth
Solar Year
Soldan
Solecism
Solemn League and Covenant
Solent
Soleure
Solfata`ra
Solferino
Solidarity
Solidus
Solingen
Solomon
Solomon of England
Solomon of France
Solomon Islands
Solomon's Ring
Solon
Solstice
Solway Firth
Solway Moss