(ah-ka' she-ah) [L.]. A large genus of leguminous trees, shrubs, and herbs, many of them Australian or African. A number of the species are medicinal, and some are ACALYPHA ACCOMMODATION poisonous. The bark is usually very astrin- gent. Gum-arabic is produced by various species — A. lebbek, A. nilotica, A. vera, and A.verek. A. Senegal also furnishes gum-ara- bic, a nearly white, transparent gum, soluble in water. It is used in the manufacture of mucil- age, and contains arabin, C l2 H 22 O n , identical in composition with cane-sugar. A. anthel- mintica. See Mussanin. A. catechu. See Catechu. A., Mucilage of (mucilago acacia, U.S. P.), acacia, 34; water, to make 100 parts; incompatible with alcoholic tinctures. A., Syrup of (syrupus acacice, U.S. P.), mucilage, 25; simple syrup, 75. It is used in various mixtures as a demulcent and to suspend in- soluble powders.