ammoniacum (am-o-ni'ak-um)

A gum resinous exudation obtained, according to some authorities, from Dorema a. but, according to others, from species of Heracleum, Ferula, and other related genera. It is used in chronic bronchitis with exce ive secretion, and externally as a counterirritant. emplastrum ammoniac i. Ammoniac plaster, made by emulsionizing gum ammoniac with dilute acetic acid, straining, and evaporating on a water-bath to a suitable consistence [U. S. Ph., 1890; Br. Ph.]. emplastrum ammoniac i cum hydragero [Br. Ph.]. A preparation containing ammonia, olive oil, and sublimed sulphur, lac ammoniac i. See mistura ammoniac i. mistura ammoniac i. Ammoniac mixture, milk of ammonia, made by rubbing ammoniacum with water [Br. Ph.]. sal a. See ammonium chlorid. ammo'niated. • Combined with or mixed with ammonia.