interconnection

noun3

1. •
   A connection (physical or logical) between multiple things

   • As socialists we see the interconnection between the institutions of classism, sexism, and racism in our personal working lives. — 1977
2. •
   Specifically, a connection between two parts.
3. •
   The connecting of renewable-energy systems to the power grid

   • A dozen states have implemented policies for interconnection.