Source : Webster's Revised Unabridged Dictionary (1913)

Chronologic \Chron`o*log"ic\, Chronological \Chron`o*log"ic*al\,
   a. [Gr. ?.]
   Relating to chronology; containing an account of events in
   the order of time; according to the order of time; as,
   chronological tables. --Raleigh. -- {Chron`o*log"ic*al*ly},
   adv.

Source : WordNet®

chronologically
     adv : with respect to chronology; "he is chronologically older"