noun
                                                something (a term or expression or concept) that has an inverse relation to something else
                                                
                                                                                                Examples
                                                
                                                                                                        - risk is the reciprocal of safety
 
                                                                                        
                                                noun
                                                (mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2
                                                                                                Synonyms
                                                
                                                                                                                                                                        multiplicative inverse
                                                                                                                                                            
                                                
                                                                                                Examples
                                                
                                                                                                        - the multiplicative inverse of 7 is 1/7
 
                                                                                        
                                                noun
                                                hybridization involving a pair of crosses that reverse the sexes associated with each genotype
                                                                                                Synonyms
                                                
                                                                                                                                                                        reciprocal cross
                                                                                                                                                            
                                                
                                                                                             
                                                                                        
                                                adjective
                                                concerning each of two or more persons or things
                                                                                                Synonyms
                                                
                                                
                                                                                                Examples
                                                
                                                                                                        - especially given or done in return
- reciprocal aid
- reciprocal trade
- mutual respect
- reciprocal privileges at other clubs
 
                                                                                        
                                                adjective
                                                of or relating to the multiplicative inverse of a quantity or function
                                                
                                                                                                Examples
                                                
                                                                                                        - the reciprocal ratio of a:b is b:a