1) Expectorant mixture 
• (n.) A polymeric modification of terpene, obtained as a white crystalline camphorlike substance; -- called also camphene. By extension, any one of a group of related substances.
Ter'e·bene noun (Chemistry) A polymeric modification of terpene, obtained as a white crystalline camphorlike substance; -- called also camphene . By extension, any one of a group of related substances. 
Type: Term Pronunciation: ter′ĕ-bēn Definitions: 1. A thin colorless liquid of an aromatic odor and taste, a mixture of terpene hydrocarbons, chiefly dipentene and terpinene, obtained from oil of turpentine; used as an expectorant and in cystitis and urethritis.