I.that which causes fermentation, leaven, yeast, ferment.
I. Lit., Plin. 18, 11, 26, § 102; 18, 7, 12, § 68: “panis sine fermento,” unleavened bread, Cels. 2, 24; 30; Vulg. Levit. 2, 4.—
B. Transf.
1. That which loosens the soil, Plin. 17, 21, 35, § 159; cf. Col. 4, 1, 7.—
2. A drink made of fermented barley, malt liquor, beer, Verg. G. 3, 380.—