Gum ARABIC, the name of a gum which distills from the Egyptian acacia tree. It is brought to us from Turkey, in small irregular masses or strings of a pale yellow colour. The true gum-arabic is rarely to be met with in the shops, gum-senega being usually sold in place of it: This resembles the other, but is generally in large rough pieces. The true kind is preferred as a medicine; but the other is cheapest and strongest, and therefore preferred for mechanical uses. It is given, from a scruple to two drams, in hoarseness, a thin acrimonious state of the juices, and where the natural mucus of the intestines is abraded. It is likewise an in-
redient in the white decoction, chalk julep, and other compositions.