Source : Webster's Revised Unabridged Dictionary (1913)

Stratigraphic \Strat`i*graph"ic\, Stratigraphical
\Strat`i*graph"ic*al\, a. (Geol.)
   Pertaining to, or depended upon, the order or arrangement of
   strata; as, stratigraphical evidence. --
   {Strat`i*graph"ic*al*ly}, adv.