The Collaborative International Dictionary of English v.0.48:

Fuliginous \Fu*lig"i*nous\, a. [L. fuliginosus, from fuligo
   soot: cf. F. fuligineux. See Fume.]
   1. Pertaining to soot; sooty; dark; dusky.
      [1913 Webster]

   2. Pertaining to smoke; resembling smoke.
      [1913 Webster]