خيط

مَخِيطٌ مخيط and ↓ مَخْيُوطٌ A garment, or piece of cloth, sewed: (S, Msb, K:) the ى in the former is the و of the measure مَفْعُولٌ, changed into ى because of its being quiescent and the preceding letter's being with kesr; the letter preceding it being made movent because it and the و are quiescent after the ى has fallen out; [for by dropping the ى it becomes changed from مَخْيُوطٌ to مَخْوْطٌ;] and it is made movent with kesr [and thus changed from مَخْوْطٌ to مَخِوْطٌ, which necessarily becomes مَخِيطٌ,] in order to its being known that the letter which has dropped out is ى: some say that the ى in مَخِيطٌ is the radical, and that the letter thrown out is the و of the measure مَفْعُولٌ, in order that the word with و [for its medial radical] may be known from that with ى; [so that it is changed from مَخْيُوطٌ to مَخْيُطٌ, and then to مَخْيْطٌ, and then to مَخِيطٌ;] but the former saying is the right, because the و is a formative augment, and it is not proper that such should be thrown out. (S.) ― -b2- Also, the former, (assumed tropical:) The whole of the exterior of the belly. (ISh.) ― -b3- And (assumed tropical:) A place of passage; (O, L, TA;) a meaning erroneously assigned in the K to ↓ خِيَاطٌ and ↓ مَخْيَطٌ: (TA:) and particularly, (tropical:) of a serpent; (TA;) the place of creeping along of a serpent. (K, TA.)