coefficient
/ˌkəʊɪˈfɪʃənt/noun
1
- Mathematics a numerical or constant quantity placed before and multiplying the variable in an algebraic expression (e.g. 4 in 4xy)【数】系数（例如4xy中的4）。
2
- Physics a multiplier or factor that measures some property【物理】率; 系数：
coefficients of elasticity
弹性系数
the drag coefficient.
阻力系数。
词源
mid 17th cent. （in the sense 'cooperating to produce a result'）： from modern Latin coefficient-, from com- 'together' + efficient- 'accomplishing' （see EFFICIENT）.