spectroscopical

from WordNet (r) 3.0 (2006)

spectroscopical
    adj 1: of or relating to or involving spectroscopy;
           "spectroscopic analysis" [syn: {spectroscopic},
           {spectroscopical}]

from The Collaborative International Dictionary of English v.0.48

Spectroscopic \Spec`tro*scop"ic\, Spectroscopical
\Spec`tro*scop"ic*al\, a.
   Of or pertaining to a spectroscope, or spectroscopy. --
   {Spec`tro*scop"ic*al*ly}, adv.
   [1913 Webster]