ثلم

أَثْلَمُ ذ A thing [such as a vessel and a sword and the like] broken in its edge: (S:) a wateringtrough, or tank, broken in its side. (TA.) -A2- أَثْلَمٌ Dust, or earth; 'and stones; like أَثْلَبٌ; accord. to El-Hejeree: but [ISd adds,] whether it be a dial. var. or formed by substitution, I know not. (M.)