isotropy

isotrooppisuus, isotropia puhekieltä The property of being identical, or having the same physical properties, in all directions.
2006, Thomas Pynchon, Against the Day, Vintage 2007, page 478,

down this road, as they watched, came a wagon, then a couple of riders, then a coach and another wagon, in daylight which slowly lost its stark isotropy and was flowed into by clouds and chimney smoke and even episodes of weather