Merriam-Webster Collegiate Dictionary - sulfurous

 also sulphurous  adjective  Date: 15th century  1.  a. of, relating to, or containing sulfur especially with a lower valence than sulfuric compounds ~ esters  b. resembling or emanating from sulfur and especially burning sulfur  2.  a. of, relating to, or dealing with the fire of hell ; infernal  b. scathing, virulent ~ denunciations  c. profane, blasphemous ~ language  Usage: see sulfur  • ~ly adverb  • ~ness noun