a person whose job involves calculating insurance risks and payments for insurance companies by studying how frequently accidents, fires, deaths, etc. happen Topics Jobsc2精算师(研究事故、火灾、死亡等发生的频率,为保险公司计算保险风险和保险费) Word Originmid 16th cent. (originally denoting a clerk or registrar of a court): from Latin actuarius ‘bookkeeper’, from actus ‘event, thing done’, act- ‘done’, from the verb agere, reinforced by the French noun acte. The current sense dates from the mid 19th cent.