[AE]ti*o*log"ic*al*ly

from The Collaborative International Dictionary of English v.0.48

Aetiological \Ae`ti*o*log"ic*al\, a.
   Pertaining to [ae]tiology; pertaining to the cause; assigning
   a cause. -- {[AE]`ti*o*log"ic*al*ly}, adv.
   [1913 Webster] etiology