רְעָדָה f. (b. h.; preced.) 1) trembling, shaking. Zeb. 116ᵃ כל … אחזתן ר׳ וכ׳ trembling seized all the kings of the nations in their palaces. Y. Ber. V, 8ᵈ bot. (ref. to Ps. II, 11) לכשיבוא יום ר׳ תגילו when the day of trembling (of the wicked) comes, you will rejoice; Bab. Ber. 30ᵇ, v. גִּילָה; Yoma 4ᵇ. Tanḥ. Noah 19; a. e. —2) vibration. Tosef. Zab. IV, 6 כל שבא … מכח ר׳ וכ׳ whatever indirect contact is produced by vibration is clean, opp. הסטה, v. הֶיסֵּט.—Pl. רְעָדוֹת questions of levitical cleanness based on indirect contact through vibration. Par. XI, 2 (v. R. S. a. l.; differ. interpret. in Maim. a. Ar.). Y. Ab. Zar. II, end, 42ᵃ הן רפפות הן רְעָלוֹת r’fafoth (Par. l. c.) is the same as r’ʿaloth