بيلونبَيْلُونٌ [Fullers' earth, which is used for scouring cloths, and is sometimes used in the bath, instead of soap;] the yellow [or rather yellowish, or yellowish gray, and sometimes white, or whitish,] earth known by the name of طَفْل. (TA, from Esh-Shiháb El-'Ajamee.)