COMPLEMENTARITY
complementarity
(noun) the interrelation of reciprocity whereby one thing supplements or depends on the other; “the complementarity of the sexes”
complementarity
(noun) a relation between two opposite states or principles that together exhaust the possibilities
Source: WordNet® 3.1
Etymology
Noun
complementarity (countable and uncountable, plural complementarities)
The state or characteristic of being complementary.
(linguistics, philosophy, semantics) A semantic relationship between two words wherein negative use of one entails the affirmative of the other with no gradability; the relation of binary antonyms.
Source: Wiktionary