רְבִיעוּת, (preced.) fructification, copulation.—Pl. רְבִיעִיּוֹת. Num. R. s. 20 (ref. to רֹבַע, Num. XXIII, 10) הר׳ שלהן … אוכלוסין שיצאו וכ׳ (ed. Wil. הרביעית, corr. acc.) who can count their fructifications, that is, the masses that came forth from those (women) who anxiously seized the opportunity of, and loved noble deeds &c.; Nidd. 31ᵃ הקב"ה … רְבִיעִיּוֹתֵיהֶם וכ׳ the Lord counts Israel’s fructifications, ‘when will the sperm come of which the righteous shall be created’?