Noun
the middle between extremes
the proportional relation between two divisions of line or two dimension of a plane figure such that short : long :: long : (short + long)
Source: WordNetOverall, the business of denazification in the French zone was considered a "golden mean between an excessive degree of severity and an inadequate standard of leniency," laying the groundwork for an enduring reconciliation between France and Germany. Source: Internet
This is done by first placing vectors along the octahedron's edges such that each face is bounded by a cycle, then similarly subdividing each edge into the golden mean along the direction of its vector. Source: Internet