形容词

名词

1. 互相的；相应的；互惠的
A reciprocal action or agreement involves two people or groups who do the same thing to each other or agree to help each another in a similar way.

1. hybridization involving a pair of crosses that reverse the sexes associated with each genotype

Synonym: reciprocal cross

2. (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2
the multiplicative inverse of 7 is 1/7

Synonym: multiplicative inverse

3. something (a term or expression or concept) that has a reciprocal relation to something else

e.g. risk is the reciprocal of safety