sestertium

noun

ses·​ter·​tium se-ˈstər-sh(ē-)əm 

plural sestertia se-ˈstər-sh(ē-)ə 

: a unit of value in ancient Rome equal to 1000 sesterces

Word History

Etymology

Latin, from genitive plural of sestertius (in the phrase milia sestertium thousands of sesterces)

First Known Use

1540, in the meaning defined above