
reciprocal  of or relating to the multiplicative inverse of a quantity or function  

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

reciprocal, multiplicative inverse  [in 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  

reciprocal cross, reciprocal  hybridization involving a pair of crosses that reverse the sexes associated with each genotype  

reciprocal, mutual  concerning each of two or more persons or things; especially given or done in return 