terpene
/ˈtɜːpiːn/noun
- Chemistry any of a large group of volatile unsaturated hydrocarbons found in the essential oils of plants, especially conifers and citrus trees. They are based on a cyclic molecule having the formula C10H16.【化】萜烯, 萜（烃）。
词源
late 19th cent.: from German Terpentin 'turpentine' + -ENE.