[elsherbini]

Totally, my mistake. The correct term is regular tunings, which yield an isomorphic layout on the guitar (well, it would if you had infinite strings). In plain english, the same shape always corresponds to the same intervals no matter what strings you are playing.

[Analog24]

Perhaps isometric would be a better description? We're probably getting into the pedantic weeds here though :-)

[osrec]

Well, this is HN, afterall :p