Mid 19th century; earliest use found in Charles Kingsley (1819–1875), novelist, Church of England clergyman, and controversialist. From paroxysm + -ic.
Definition of paroxysmic in US English:
paroxysmic
adjectiveˌparəkˈsɪzmɪk
Paroxysmal.
Origin
Mid 19th century; earliest use found in Charles Kingsley (1819–1875), novelist, Church of England clergyman, and controversialist. From paroxysm + -ic.