What does arvīna mean in Latin?

arvīna, a noun, means “fat, especially suet or lard”.

What is the genitive of arvīna?

The genitive singular is arvīnae. arvīna is feminine, first declension.

arvīna, ae, f.

I. Grease, fat, suet, lard.

A. In gen.: pinguis, * Verg. A. 7, 627 (secundum Suetonium arvina est durum pingue, quod est inter cutem et viscus, Serv.).—

B. Esp.

a. Of the victim in a sacrifice (eccl. Lat.), Vulg. Exod. 29, 22; ib. Lev. 3, 15; so the dim. arvinula, * ib. ib. 8, 16.—

b. Of a person: de latere ejus arvina dependet, Vulg. Job, 15, 27.—

II. Greasiness, fatness, in gen., Prud. Cath. 7, 9; Sid. Ep. 8, 14.—

III. Arvīna, a surname of the dictator A. Cornelius Cossus, Liv. 8, 38.

Maybe from the same Proto-Indo-European root as Ancient Greek ὀρύα (orúa, “kind of sausage”).