Acherontic

from WordNet (r) 3.0 (2006)

Acherontic
    adj 1: dark and dismal as of the rivers Acheron and Styx in
           Hades; "in the depths of an Acheronian forest"; "upon
           those roseate lips a Stygian hue"-Wordsworth [syn:
           {Acheronian}, {Acherontic}, {Stygian}]

from The Collaborative International Dictionary of English v.0.48

Acherontic \Ach`e*ron"tic\, a.
   Of or pertaining to Acheron; infernal; hence, dismal, gloomy;
   moribund.
   [1913 Webster]

[email protected]