Siliqua - Light Roman silver coin minted from the 4th to 7th century

"The siliqua is the modern name given to small, thin, Roman silver coins produced in the 4th century A.D. and later. When the coins were in circulation, the Latin word siliqua was a unit, perhaps of weight defined by one late Roman writer as one twenty-fourth of a Roman solidus."Siliqua vicesima quarta pars solidi est, ab arbore, cuius semen est, vocabulum tenens."A siliqua is one-twentyfourth of a solidus [coin] and the name is taken from the seed of a tree. - Wikipedia"