Look up: Sestertius

1. Sestertius
   (Latin) a silver coin that, during the time of the Republic, was valued at a two and a half denarii; later, the sestertius was made of copper and worth 4 denarii during the Imperial period.
   Found on http://ablemedia.com/ctcweb/glossary/glo
   
   
2. sestertius
   An ancient Roman coin; plural, sestertii.
   Found on http://www.encyclo.co.uk/local/10143
   
   
3. Sestertius
   A large Roman brass coin. Four times the value of an as. The plural is 'sestertii'.
   Found on http://www.forumancientcoins.com/
   
   
4. Sestertius
   The `sestertius`, or `sesterce`, was an ancient Roman coin. During the Roman Republic it was a small, silver coin issued only on rare occasions. During the Roman Empire it was a large brass coin. The name sestertius (originally semis-tertius) means "2 ½", the coin`s origin...
   Found on http://en.wikipedia.org/wiki/Sestertius