Lewis & Short

būnĭăs, ădis, f., = βουνιάς, a kind of Swedish turnip, Col. 10, 422; acc. buniada, Plin. 20, 4, 11, § 21.
Another kind is called būnĭon, ii, n., = βούνιον, Plin. l. l.
Hence, būnītus, a, um, adj., made from bunion: vinum, Cael. Aur. Tard. 4, 3, 52.