What does banāna mean in Latin?

banāna, a noun, means “banana”.

What is the genitive of banāna?

The genitive singular is banānae. banāna is feminine, first declension.

In classical Latin, [baˈnaː.na]; in ecclesiastical (church) Latin, [baˈnaː.na].

noun · femininefirst declension

banāna f (genitive banānae)

Classical[baˈnaː.na]Ecclesiastical[baˈnaː.na]

New Latinbanana
Illi amicabiliter ad navem noſtram appellentes, tantum Cocorum ac Bananarum nobis obtulerunt numerum, ut quilibet in navi nuces 50. duos Bananarum corbes eo die lucraretur.1619, Americæ pars undecima: Seu descriptio admirandi itineris a Guilielmo Schouten Hollando peracti: […], Oppenheim: Typis Hieronymi Galleri, page 41:
Tabaci, Cocorum, Bananarum, oryzæ, piſorum, fabarum, porcorum, gallinarum & piſcium nobis faciebant copiam.1622, Antonio de Herrera [y Tordesillas], translated by C[aspar] Barlæus, Novus Orbis, Sive Descriptio Indiae Occidentalis, […], Amsterdam: Apud Michaelem Colinium Bibliopolam, ad insigne Libri Domestici, page 71:

Internationalism. Vowel length cannot be properly ascribed, but the word-stress is surely on the second syllable.