saponin
/ˈsæpənɪn/noun
mass noun
1- Chemistry a toxic compound which is present in soapwort and makes foam when shaken with water【化】皂角苷。
1.1
- count noun any of the class of steroid and terpenoid glycosides typified by this, examples of which are used in detergents and foam fire extinguishers具有皂角苷特性的甾族和萜糖苷类物质（例如清洁剂和泡沫灭火器中使用的物质）。
词源
mid 19th cent.: from French saponine, from Latin sapo, sapon- 'soap'.