docent
/dəʊˈsent/noun
1
- (in certain US and European universities and colleges) a member of the teaching staff immediately below professorial rank（美国和欧洲一些大学级别低于教授的）讲师。
2
- a person who acts as a guide, typically on a voluntary basis, in a museum, art gallery, or zoo（博物馆、艺术画廊或动物园里的）讲解员（多指志愿者）。
词源
late 19th cent.: via German from Latin docent- 'teaching'， from docere 'teach'.