Today I was reading Jean-Louis Loday's classic paper, "Realization of the Stasheff polytope", in which he produces a simple and very pretty realization of the associahedra as convex polytopes. He introduces the permutohedra like so:

Let us recall the definition of the

permutohedron(alias zylchgon).

I had not heard this alternate name for permutohedra before, and tried to figure out the origin, but couldn't find anything. Sadly, Loday is no longer alive, so I can't ask him. Does anyone know the origin of "zylchgon"?

Unstable Homotopy from the Stable Point of View. Milgram cites an earlier 1966 paper as the origin of the concept, but I did not find the name there. $\endgroup$ – Carlo Beenakker Oct 19 '18 at 20:18