honorarium
noun [ C ] formal uk/ˌɒn.əˈreə.ri.əm/ us/ˌɑː.nəˈrer.i.əm/ honorariums or honoraria /ˌɒn.əˈreə.ri.ə/ /ˌɑː.nəˈrer.i.ə/
酬金，谢礼
a usually small amount of money paid to someone for a service for which no official charge is made
We usually offer our visiting lecturers an honorarium of £500. 我们通常都会付给客座讲师500英镑的酬金。