شب

شَبٌّ ذ , and its fem. شَبَّةٌ: see شَابٌّ. -A2- Also The stones of زَاج [or vitriol ]: (K:) or the stones from which زاج and the like thereof are obtained; the best whereof is that which is brought from El-Yemen, which is white شبّ, and is very glistening: (TA:) [but شَبٌّ يَمَانِىٌّ, as also شَبٌّ alone, is a name now commonly given to alum: ] or it is a certain thing resembling زاج: (S, Msb:) or a species thereof: accord. to El-Fárábee, the stones from which come زاج and the like: Az says, it is one of the minerals produced by God in the earth, with which one tans, and resembling زاج, and the name [correctly] heard is thus, with ب, but is by some mistranscribed with the three-dotted ث, [i. e. شَثٌّ,] which is a kind of tree of bitter taste, and I know not whether one tans with it or not: accord. to Mtr, in the saying that one tans with شبّ, this word is a mistranscription; for شبّ is a dye, and one does not tan with a dye; it is mistranscribed for شَثّ, which is a kind of tree like the dwarf apple-tree, whereof the leaves are like those of the خِلَاف [q. v.], and with them one tans: El-Fárábee also says, in the section of ث, that the شَثّ is a species of mountain-tree, with which one tans: from all which it appears that one tans with both of them; for an affirmation is to be preferred to a negation: (Msb:) and it is a well-known medicine; (K, TA;) as some say: so accord. to the correct copies of the K, in some of which, دَاآءٌ is put for دَوَاآءٌ. (TA.)