What does Ophiūsa mean in Latin?

Ophiūsa, a proper noun, means “The name of several islands”.

What is the genitive of Ophiūsa?

The genitive singular is Ophiūsae. Ophiūsa is feminine, first declension.

In classical Latin, [ɔ.pʰiˈuː.sa]; in ecclesiastical (church) Latin, [o.fiˈuː.s̬a].

proper noun · femininefirst declension

Ophiūsa f sg (genitive Ophiūsae)

Classical[ɔ.pʰiˈuː.sa]Ecclesiastical[o.fiˈuː.s̬a]

ŏphĭūsa or ŏphĭussa, ae, f., = ὀφιοῦσα or ὀφιοῦσσα,

I. a magical herb growing on the island of Elephantine, Plin. 24, 17, 102, § 163.

Ŏphĭūsa or Ŏphĭussa, ae, f., = Ὀφιοῦσα (-οῦσσα)

I. An ancient name of Cyprus, whence ŏphĭūsĭus, a, um, Cyprian: arva, Ov. M. 10. 229.—

II. The name of several islands, Plin. 3, 5, 11, § 78; 5, 31, 36, § 132; 4, 12, 20, § 61; 5, 32, 44, § 151.—

III. A town in Pontus, Plin. 4, 12, 26, § 82.

Borrowed from Ancient Greek Ὀφιούσσα (Ophioússa).