What does nerion mean in Latin?

nerion, a noun, means “oleander (Nerium oleander)”.

What is the genitive of nerion?

The genitive singular is neriī. nerion is neuter, second declension.

noun · neutersecond declension

nerion n (genitive neriī)

nērĭon (nērĭum), ii, n., = νήριον,

I. the oleander or rosebay, Plin. 16, 20, 33, § 79; 24, 11, 53, § 90.

Borrowed from Ancient Greek νήριον (nḗrion).

What does nerion mean in Latin?: nerion, a noun, means “oleander (Nerium oleander)”.
What is the genitive of nerion?: The genitive singular is neriī. nerion is neuter, second declension.