polycrystalline

adj

Etymology: Etymology tree Proto-Indo-European *pleh₁- Proto-Indo-European *polh₁ús Ancient Greek πολῠ́ς (polŭ́s)lbor. English poly- English crystalline English polycrystalline From poly- + crystalline.

1. Composed of an aggregate of very small crystals in random orientations

   “This was revealed only in the experiments of ion bombardment of single crystals, because a polycrystalline material, even though its microcrystallites have a regular structure, in fact behaves like a nonarranged, random system.”