Many crystals. Polycrystalline structures are composed of many different crystals. Contrast with monocrystalline. See crystalline and polysilicon.
Browse entries near polycrystalline
polycotyledon
polycotyledonous
polycrotic
polycrotism
Polycryst
polycyclic
polycyclic (science)
polycyclic aromatic hydrocarbon
polycyesis
polycystic