1) Coin of the Byzantine Empire 
The aspron (ἄσπρον), from Latin asper, was a late Byzantine name for silver or silver-alloy coins. The Latin word asper originally meant `rough`, but had gradually acquired the connotation of `fresh` and, especially when referring to silver, `white`, by the imperial period.{sfn|Grierson|1991|p=211} It acquired a technical meaning in t...