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- polycrystalline ingot
- polycrystalline material
- polycrystalline polymer
- polycrystalline silicon
- polycrystalline silicon solar cell
- polycrystal semiconductor
- polycrystal silicon
- polycrystal X-ray diffractometry
- polycube
- polycyclic
- polycyclic aromatic hydrocarbon
- polycyclic aromatic hydrocarbons（PAHs） analysis
- polycyclic borazine
- polycyclic dimension
- polycyclic group
- polycyclicity
- polycyclic landform
- polycyclic series
- polycyclic tectonic movement
- polycyclobutene
- polycyclopentadiene
- polycyclotrimerization
- polycylinder
- polycylindrical domain
- polycystic kidney