interdependencein‧ter‧de‧pen‧dence /ˌɪntədɪˈpendəns $ -tər-/ (also in‧ter‧de‧pen‧den‧cy /-dənsi/) noun [countable usually singular, uncountable] 
a situation in which people or things depend on each otherinterdependence of
the interdependence of our body’s immune and nervous systems
a situation in which people or things depend on each otherinterdependence of the interdependence of our body’s immune and nervous systems