philosopher's stone

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++phiˌlosopher’s ˈstone noun [singular]  RPan imaginary substance that was thought in the past to have the power to change any other metal into gold 点金石〔旧时被认为能使任何金属变成黄金的虚构物质〕

Examples from the Corpus

philosopher's stone• All that is needed is for the philosopher's stone of artistic intention to be applied to them.• There is more than a hint of the search for the philosopher's stone.

phiˌlosopher’s ˈstone nounChineseSyllable  

that thought past the to an in imaginary Corpus was substance

philosopher's stone
phiˌlosopher’s ˈstone noun [singular]
an imaginary substance that was thought in the past to have the power to change any other metal into gold