1Philosophers' stone.
2An egg-shaped glass vessel with a long neck, used for heating substances over a long period of time.
Late 15th century; earliest use found in Secreta Secretorum.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。