Jastrow: גִּיגִּית

גִּיגִּית f. (cmp. גַּג) something arched, roofing, a huge vessel, tub, tank (for brewing beer); reservoir. Sabb. 18ᵇ ג׳ … מ"ט שרו וכ׳ why do the Hillelites permit the preparation of beer in the tank (where the process is continued on the Sabbath)? Ib. XXIV, 5 אם יש בג׳ whether there is in the roofing (which connected two buildings) &c. Ib. 157ᵇ ג׳ סדוקה וכ׳ a defective roofing rested over them. Ib. 108ᵇ sq. יד לג׳ כ׳ the hand which is put in the beer tank (in the morning, before being washed); [Ar.: a hand used for taking beer to tap out of the tank]. Snh. 77ᵃ כפה עליו ג׳ if one inverts a tank over a man (causing his death indirectly). Sabb. 88ᵃ כפה … כג׳ the Lord arched the mount over them like a tank; Ab. Zar. 2ᵇ; a. e.—Pl. גִּיגִּיּוֹת. Y. Snh. VII, 25ᵇ bot. מה שבג׳ וכ׳ what lives in reservoirs or in vivaria. Succ. IV, 6 ג׳ של זהב gilt tanks.