سمحقسِمْحَاقٌ [The pericranium; i. e.] the thin skin, (T, Mgh, Msb,) or thin integument, (S, Mgh, K,) above the skull: (T, S, Mgh, Msb, K:) and any thin skin resembling that; (Msb;) or [the periosteum of any bone; i. e.] the skin that is between the bone and the flesh, above the bone and beneath the flesh; every bone having what is thus termed: (TA:) [pl. سَمَاحِيقُ. b2:  Hence,] one says, عَلَىثَرْبِ الشَّاةِ سَمَاحِيقُ مِنْ شَحْمٍ, (S, K, TA,) i. e. (tropical:)  [Upon the fat that covers the stomach and bowels of the sheep or goat is or are] a thin integument [or thin integuments of fat]. (TA.) b3:  And سَمَاحِيقُ السَّمَآءِ (tropical:)  The [strata or] thin portions of cloud. (S, K, TA.) b4:  سِمْحَاقٌ also signifies [The cicatrix which is] the mark of circumcision. (TA.) b5:  And A wound by which the head is broken (شَجَّةٌ [q. v.]) reaching to the thin skin, or integument, thus called. (T, S, Msb, K.) سُكْحُوقٌ Tall; applied to a palm-tree; (S, O, K;) as also سَحُوقٌ: (S:) or tall and thin: (Lth, TA:) not known to Az on any other authority than that of Lth. (TA.) [J held the م in each of these words, as he says, to be augmentative; and has therefore mentioned them in art. سحق.]