from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A large bronze or (rarely) small silver coin minted during the Roman Republic and Empire, valued at two and a half asses.
from The Century Dictionary and Cyclopedia
- n. A silver coin of the Roman republic, first issued in 269 b. c. It was the quarter of the denarius. See denarius. In the quotation there is a confusion of sestertius and sestertium.
- n. The largest coin of copperalloy of the Roman empire.
From Latin sēstertius ("that is two-and-a-half"), from sēmis ("half") + tertius ("third"). (Wiktionary)