What does Thapsacus mean in Latin?

Thapsacus, a proper noun, means “An important town on the right bank of the Euphrates”.

What is the genitive of Thapsacus?

The genitive singular is Thapsacī. Thapsacus is masculine, second declension.

In classical Latin, [ˈtʰap.sa.kʊs]; in ecclesiastical (church) Latin, [ˈtap.sa.kus].

proper noun · masculinesecond declension

Thapsacus m sg (genitive Thapsacī)

Classical[ˈtʰap.sa.kʊs]Ecclesiastical[ˈtap.sa.kus]

Thapsăcus, i, f., = Θάψακος,

I. a town of Syria, on the Euphrates, now El-Hammam, Plin. 5, 24, 21, § 87.

Borrowed from Ancient Greek Θάψακος (Thápsakos).