psythius

psythĭus or psĭthĭus, a, um, adj., = psuthios (psith-), psythian, a designation of a species of vine:

vitis,

Verg. G. 4, 269; Col. 3, 2, 24.—Called also simply psythĭa, ae, f., Verg. G. 2, 93; and in plur.:

psythiae (sc. uvae),

Stat. S. 4, 9, 38.— Neutr. subst.: psythĭum, ii, a kind of raisin - wine, Plin. 14, 9, 11, § 80.