Polycyclic may refer to:
Polycyclic compound, a cyclic compound with more than one hydrocarbon loop or ring structures, including: Polycyclic musks Polycyclic aromatic hydrocarbon Chlorinated polycyclic aromatic hydrocarbon Contorted polycyclic aromatic hydrocarbon
Polycyclic group, in mathematics, a solvable group that satisfies the maximal condition on subgroups
Polycyclic spawning, when an animal reproduces multiple times during its lifespan