רָדוּ, (רְדֵי III) ploughing. B. Bath. 12ᵃ בי ר׳ יומא (Ms. M. רָדֵי; v. Rabb. D. S. a. l. note; Ar. כי רדי וכ׳, v. רִדְיָא) as large a field as requires a day for ploughing.