1
- given, felt, or done in return回报的; 报答的, 答谢的：
she was hoping for some reciprocal comment or gesture.
她希望得到回报性的评述或示意。
2
- (of an agreement or obligation) bearing on or binding each of two parties equally（协定, 义务）互惠的, 对等的; 相互补偿的：
the treaty is a bilateral commitment with reciprocal rights and duties.
该条约是一个带有对等权利和义务的双边承诺。
2.1
- Grammar (of a pronoun or verb) expressing mutual action or relationship【语法】（代词, 动词）互相的。
3
- (of a course or bearing) differing from a given course or bearing by 180 degrees（路线, 方向）反向的。
4
- Mathematics (of a quantity or function) related to another so that their product is unity【数】（量, 函数）倒数的; 互反的, 互逆的。
1
- technical a mathematical expression or function so related to another that their product is unity; the quantity obtained by dividing the number one by a given quantity〈技〉倒数; 乘法逆元素。
2
- Grammar a pronoun or verb expressing mutual action or relationship, e.g. each other, fight【语法】反身代词; 相互动词（如each other, fight）。
派生词
reciprocality
nounreciprocally
adverb词源
late 16th cent.: from Latin reciprocus （based on re- 'back' + pro- 'forward'） + -AL.