ذيفذِيفَانٌ and ذَيْفَانٌ (S, M, K) and ذَيَفَانٌ (M, K) Deadly poison: (S, M, K:) or poison that takes effect; or that remains fixed, and collects: (M:) a dial. var. of ذِئْفَانٌ &c., (K,) and ذُوفَانٌ. (M.) And the second of these words, Death: so in the saying, سَقَاهُ اللّٰهُ كَأْسَ الذَّيْفَانِ [May God give him to drink the cup of death]; as mentioned by Lh. (M.)