A connection between two or more vertices of a hypergraph. A hyperedge connecting just two vertices is simply a usual graph edge.
Hyperedge
See also
Graph Edge, HypergraphExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Hyperedge." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Hyperedge.html