What does zmintha mean in Latin?

zmintha, a noun, means “a type of mint, or simply an alternative form of menta (“mint”)”.

What is the genitive of zmintha?

The genitive singular is zminthae. zmintha is feminine, first declension.

In classical Latin, [ˈzmɪn.tʰa].

noun · femininefirst declension

zmintha f (genitive zminthae)

Classical[ˈzmɪn.tʰa]

femininea type of mint, or simply an alternative form of menta (“mint”)
Namque et ocimum senectute degenerat in serpyllum, et sisymbrium in zmintham, et ex semine brassicae vetere rapa fiunt, atque invicem.For basil decays with old age into wild thyme, and water mint into zmintha, and turnips are produced from old cabbage seed, and so forth.77 CE – 79 CE, Plinius Maior, Naturalis Historia 19.57.176

zmintha, ae, f.,

I. an aromatic plant, a kind of mint, Plin. 19, 10, 57, § 176.

Presumably from menta, mintha, though the precise origin of the z- is obscure. See menta for more.