noun, noun which may take the genitive case particle 'no'
polycrystal; polycrystalline
Technical term used in materials science and crystallography. As a noun, refers to a solid composed of many small crystals. As a no-adjective, describes something consisting of multiple crystals.
Polycrystalline silicon is widely used in solar cells.
This material has a polycrystalline structure.
polycrystalline
Compound of 多 (many) and 結晶 (crystal). A straightforward technical term.