Polycrystalline | Definition of Polycrystalline by Merriam .
polycrystalline ; 3 [polycrystalline] () (1): pydict data [pydict] polycrystalline ; (2): WordNet (r) 3.0 (2006) [wn] polycrystalline adj 1: composed of aggregates of crystals; "polycrystalline metals" adj