רָקָב, preced.) rottenness, esp. raḳab, a mass of earth from a grave containing parts of a decayed human body, which causes uncleanness if of a certain quantity (תַּרְוָוד). Naz. VII, 2 מלא תרווד ר׳ a spoonful of raḳab. Tosef. Ohol. II, 2 מלא תרווד ר׳ שאמרו וכ׳ the spoonful of raḳab of which they speak (as making unclean) means as much as is grabbed with the fingers from their roots and upwards. Ib. 3 ואיזהו מת שיש לו ר׳ what corpse is it to which the law of raḳab applies?; Naz. 51ᵃ; Y. ib. VII, 56ᵇ bot.; a. fr.