| ̷ ̷ ̷ ̷|sizməl adjective
1. : of, relating to, or of the nature of a paroxysm
paroxysmal volcanic eruptions — Arthur Holmes
paroxysmal seizure
2. : marked or accompanied by paroxysms
whooping cough … treated in the early paroxysmal stage — Therapeutic Notes
the paroxysmal phase in alpine type of orogeny — P.H.Kuenen & Albert Carozzi