مضر

مَاضِرٌ ذ (S, A, Msb, K) and ↓ مَضِيرٌ (A, Msb, K) and ↓ مَضِرٌ, (IAar, K,) the last thought by ISd to be a kind of relative or possessive epithet, because the verb is مَضَرَ, (TA,) [but it seems that he was unacquainted with, or that he disallowed, the form مَضِرَ, of which it is the regular part. n.,] Milk that is sour, or acid, (A, Msb,) biting the tongue: (A:) or such as bites the tongue, (S, TA,) before becoming رَائِب: (TA:) or that has become sour, or acid, and white. (K.)