كرس

كِرْيَاسٌ ذ A privy on the top of the roof of a house, (S, A, * Msb, K,) with a conduit from the ground, (K,) or, as in some lexicons, to the ground: one that is below is not so called: (TA:) or the privy of an upper chamber: (MF:) of the measure فِعْيَالٌ, (Az, Msb, K,) from كِرْسٌ, meaning, “ compacted dung and urine of camels, or of sheep or goats: ” (Az, * A, * K, TA:) so called because of the filth that adheres to it, and becomes compacted: (Az, TA:) incorrectly said by some to be also written كِرْبَاسٌ, with the single-pointed letter [ب]: the pl. is كَرَايِيسُ. (TA.)