Definitions for "Polycyclic"
Of a disease or pathogen: Producing many generations of inoculum and many cycles of infection during a single growing season. (See monocyclic.) ()
cyclic structure contains rings of bonds; a structure having many such rings is termed polycyclic. In the polycyclic structures of interest in this volume, a large fraction of the atoms are members of multiple small rings, resulting in considerable rigidity.
Having two or more rings or whorls.
In reference to sleep, multiple sleep periods and wake periods in a 24-hour day.