| a. | 1. | Of or pertaining to Acheron; infernal; hence, dismal, gloomy; moribund. |
| Adj. | 1. | Acherontic - 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 Synonyms: Acheronian, Stygian |