A line segment where two faces of a polyhedron meet, also called a side.
Polyhedron Edge
See also
Polygon Edge, Polyhedron VertexExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Polyhedron Edge." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/PolyhedronEdge.html