Jastrow: רְבִיעָה

רְבִיעָה f. (רָבַע) 1) coupling, esp. (v. Lev. XX, 16) carnal connection with beasts, buggery. Ab. Zar. II, 1 מפני … הר׳ because they (the gentiles) are suspected of using beasts for buggery. Ib. 23ᵃ. B. Kam. 40ᵇ, sq.; a. e. —2) (v. בַּעַל h. [fructification,] rainfall in the autumn. Taan. 6ᵇ עד … ר׳ שנייה until the second rainfall comes down. Ib. מאי לשון ר׳ דבר שרובע וכ׳ what is the radical meaning of רביעה? Something which fructifies the ground, as R. J. says, ‘the rain is the husband &c.’ Ib. ר׳ ראשונה כדי וכ׳ the first rainfall (is satisfactory, and you need no fast-day), when there is enough to enter the ground to the depth of one handbreadth; ר׳ שנייה כדי לגוף וכ׳ the second rainfall (is satisfactory), when the soil is fit to be used for sealing the mouth of a cask. Ib. 6ᵃ; Tosef. ib. I, 3. Ib. 4 רביע ed. Zuck. (corr. acc.). Gen. R. s. 13 כדי ר׳ enough rain to be called r’biʿah (fructification); a. fr.—Tosef. B. Kam. I, 9 ועל ר׳ ed. Zuck., v. רְבִיצָה.]