Source : Webster's Revised Unabridged Dictionary (1913)

Cyclonic \Cy*clon"ic\ (s?-kl?n"?k), a.
   Pertaining to a cyclone.

Source : WordNet®

cyclonic
     adj 1: of or relating to or characteristic of the atmosphere around
            a low pressure center; "cyclonic cloud pattern" [syn:
            {cyclonal}, {cyclonical}]
     2: of or relating to or characteristic of a violent tropical
        storm; "cyclonic destruction" [syn: {cyclonal}, {cyclonical}]