What does hippopēra mean in Latin?

hippopēra, a noun, means “saddlebag, horse-holdall”.

What is the genitive of hippopēra?

The genitive singular is hippopērae. hippopēra is feminine, first declension.

In classical Latin, [hɪp.pɔˈpeː.ra]; in ecclesiastical (church) Latin, [ip.poˈpɛː.ra].

noun · femininefirst declension

hippopēra f (genitive hippopērae)

Classical[hɪp.pɔˈpeː.ra]Ecclesiastical[ip.poˈpɛː.ra]

saddlebag, horse-holdall
M. Cato Censorius, quem tam rei publicae fuit nasci quam Scipionem (alter enim cum hostibus nostris bellum, alter cum moribus gessit), cantherio vehebatur et hippoperis quidem impositis, ut secum utilia portaret.Cato the Elder, him being born indeed healsome for the society like Scipio (for the one fought war with our foes, the other without our mores), rode along with a gelding and merely two saddlebags on it to stow his belongings.c. 65 CE, Seneca Minor, Epistulae morales ad Lucilium 87.9
خرجین churḡīn, & خرجینه churḡīne, i. q. خرج churḡ. Hippopera.خرجین churḡīn, & خرجینه churḡīne, i. q. خرج churḡ. Saddle-bag.1680, Franciszek à Mesgnien Meninski, “خرجین”, in Thesaurus linguarum orientalium, Turcicae, Arabicae, Persicae, praecipuas earum opes à Turcis peculiariter usurpatas continens, nimirum Lexicon Turkico-Arabico-Persicum (in Ottoman Turkish, Turkish, Latin, German, Italian, French, and Polish), Vienna, column 1878:

Borrowed from Ancient Greek ἱπποπήρα (hippopḗra).