The Collaborative International Dictionary of English v.0.48:

Melancholic \Mel"an*chol`ic\, a. [L. melancholicus, Gr. ?: cf.
   F. m['e]lancholique.]
   Given to melancholy; depressed; melancholy; dejected;
   unhappy.
   [1913 Webster]

         Just as the melancholic eye
         Sees fleets and armies in the sky.       --Prior.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Melancholic \Mel"an*chol`ic\, n. [Obs.]
   1. One affected with a gloomy state of mind. --J. Spenser.
      [1913 Webster]

   2. A gloomy state of mind; melancholy. --Clarendon.
      [1913 Webster]

WordNet (r) 3.0 (2006):

melancholic
    adj 1: characterized by or causing or expressing sadness;
           "growing more melancholy every hour"; "her melancholic
           smile"; "we acquainted him with the melancholy truth"
           [syn: melancholy, melancholic]
    n 1: someone subject to melancholia [syn: melancholic,
         melancholiac]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "melancholic":
   ambivert, atrabiliar, atrabilious, blase, blue, brooder, choleric,
   cycloid, cyclothyme, cyclothymic, depressing, depressive,
   dispirited, ectomorph, endomorph, extrovert, fed-up, funky,
   gloomy Gus, good and tired, introvert, irked, jaded, joyless,
   life-weary, melancholiac, melancholy, mesomorph, mope, pensive,
   phlegmatic, sad, saddening, sanguine, satiated, schizoid,
   schizothyme, sick, sick of, sourpuss, splenetic, syntone, tired,
   tired of, tired of living, tired to death, triste, tristful,
   wearied, weariful, weary, weary unto death, wistful, world-weary