Definition of reciprocity noun from the Oxford Advanced Learner's Dictionary

 

reciprocity

 noun
noun
BrE BrE//ˌresɪˈprɒsəti//
 
; NAmE NAmE//ˌresɪˈprɑːsəti//
 
[uncountable](formal)
 
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a situation in which two people, countries, etc. provide the same help or advantages to each other Word Origin mid 18th cent.: from French réciprocité, from réciproque, from Latin reciprocus ‘moving backwards and forwards’ (based on re- ‘back’ + pro- ‘forward’).
See the Oxford Advanced American Dictionary entry: reciprocity