etymological

from WordNet (r) 3.0 (2006)

etymological
    adj 1: based on or belonging to etymology; "I merely drew an
           etymological distinction"

from The Collaborative International Dictionary of English v.0.48

Etymological \Et`y*mo*log"ic*al\ (-m[-o]*l[o^]j"[i^]*kal), a.
   [L. etymologicus, Gr. 'etymologiko`s: cf. F. ['e]tymologique.
   See {Etymology}.]
   Pertaining to etymology, or the derivation of words. --
   {Et`y*mo*log"ic*al*ly}, adv.
   [1913 Webster]