[sul.fu.rous] also sul.phu.rous adj (15c) 1 a: of, relating to, or containing sulfur esp. with a lower valence than sulfuric compounds "~ esters" b: resembling or emanating from sulfur and esp. 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 -- sul.fu.rous.ly adv -- sul.fu.rous.ness n