The sestertium was equivalent to one thousand sesterces, equal to �8 17s 1d. Sterling, or about $43, before the reign of Augustus. After his reign its value was about �7 16s. 3d. Sterling. The sesterce was originally coined only in silver, but later both in silver and brass.
Origin: L. Sestertius (sc. Nummus), fr. Sestertius two and a half; semis half _ tertius third: cf. F. Sesterce.