>Nexus [nek suhs] (noun)
1. A connection or link associating two or more people or things
2. a group or series of connected people or things
3. the center or focus of something
4. a specialized part of the cellular membrane that helps cells to communicate or adhere
Sally was the nexus that held the kept the ladies social group together.
The nexus of their Center for Children was simply that everyone deserved love.