اسفيداجإِسْفِيدَاجٌ [Ceruse; or white lead;] ashes of lead (رَمَادُ الرَّصَاصِ والآنُكِ, K, which last word is as though it were added to explain that immediately preceding, TA): when subjected to a fierce heat, it becomes what is termed إِسْرَنْجٌ: [so in the CK: more probably إِسْرِنْجٌ:] it has clearing and mitigating properties, (K,) and other useful qualities: (TA:) an arabicized word [from the Persian اسفيداج isfédáj]. (K.)