sestertium

noun, plural ses·ter·ti·a [se-stur-shee-uh, -shuh] /sɛˈstɜr ʃi ə, -ʃə/.

1. a money of account of ancient Rome, equal to 1000 sesterces.

noun plural -tia (-tɪə)

1. an ancient Roman money of account equal to 1000 sesterces