denarius
Concise Oxford English Dictionary © 2008 Oxford University Press:
denarius /dɪˈnɛːrɪəs, dɪˈnɑːrɪəs/
▶noun (pl. denarii /-rɪʌɪ, -rɪiː/) an ancient Roman silver coin, originally worth ten asses.
■ an ancient Roman gold coin worth 25 silver denarii.
– origin L., lit. ‘containing ten’, from deni ‘in tens’.
'denarius' also found in these Oxford entries:

