שְׂאוֹר m. (b. h. שְׂאֹר; שאר to swell, rise) 1) rise, swelling Maasr. I, 2 התמרים משיטילו ש׳ (Ar. dates are subject to tithes when they begin to swell (rise like dough), expl. Y. ib. 48ᵈ bot. משיתמלא החרץ, v. חֶרֶץ; Y. Dem. I, 21ᶜ bot. —2) leaven. Ḥall. II, 6 הם ושְׂאוֹרָן וכ׳ if they (the quantities of flour) with the leaven put in and the bran … make up the five Kabs. Pes. 5ᵃ השבתת ש׳ the removal of leaven (Ex. XXI, 15). Bets. 7ᵇ ש׳ שאין ראוי וכ׳ leaven, which is not fit to eat, opp. חמץ; a. fr.—Trnsf. passion, evil inclination, corruption. Ber. 17ᵃ, v. עִיסָה. Gen. R. s. 34 (ref. to Gen. VIII, 21) עלוב הוא הש׳ וכ׳ it is poor leaven which he that created it declares to be bad. Yalk. Ruth 601 אל תאמן … תופס שְׂאוֹרוֹ trust no proselyte up to twenty-four generations, for he still retains his corruption, v. סִיאוּר.—V. שִׂיאוּר.