Also What flows [upon, or from, the whetstone] on the occasion of sharpening iron [or a knife or the like], and which is always stinking. (Fr, L.) And What falls from a stone when one rubs, or grates, it (Fr, S, L, K) upon another stone. (Fr, L.)
3.
-A2- See also سِنٌّ, in the latter half of the paragraph.