sestertius
nounEtymology From Latin sēstertius (“that is two-and-a-half”), from sēmis (“half”) + tertius (“third”), in which “third” refers to the third as: the sestertius was worth two full asses and half of a third.
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Hobbies, Lifestyle, Numismatics Historical A large bronze or (rarely) small silver coin minted during the Roman Republic and Empire, valued at two and a half asses (a quarter of a denarius).