The Collaborative International Dictionary of English v.0.48:

Cadaverous \Ca*dav"er*ous\, a. [L. cadaverosus.]
   1. Having the appearance or color of a dead human body; pale;
      ghastly; as, a cadaverous look.
      [1913 Webster]

   2. Of or pertaining to, or having the qualities of, a dead
      body. "The scent cadaverous." -- Ca*dav"er*ous*ly, adv.
      -- Ca*dav"er*ous*ness, n.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cadaverous
    adj 1: very thin especially from disease or hunger or cold;
           "emaciated bony hands"; "a nightmare population of gaunt
           men and skeletal boys"; "eyes were haggard and
           cavernous"; "small pinched faces"; "kept life in his
           wasted frame only by grim concentration" [syn: bony,
           cadaverous, emaciated, gaunt, haggard, pinched,
           skeletal, wasted]
    2: of or relating to a cadaver or corpse; "we had long
       anticipated his cadaverous end" [syn: cadaverous,
       cadaveric]

Moby Thesaurus II by Grady Ward, 1.0:

96 Moby Thesaurus words for "cadaverous":
   achromatic, achromic, anemic, ashen, ashy, attenuated, bled white,
   bloodless, blue, chloranemic, colorless, corpselike, dead, deadly,
   deadly pale, deathlike, deathly, deathly pale, dim, dimmed, dingy,
   discolored, dull, eerie, emacerated, emaciate, emaciated,
   etiolated, exsanguinated, exsanguine, exsanguineous, faded, faint,
   fallow, flat, ghastly, ghostlike, ghostly, gray, grisly, gruesome,
   haggard, hollow-eyed, hueless, hypochromic, jejune, lackluster,
   leaden, livid, lurid, lusterless, macabre, marantic, marasmic, mat,
   mealy, mortuary, muddy, neutral, pale, pale as death, pale-faced,
   pallid, pasty, peaked, peaky, pinched, poor, puny, sallow,
   shriveled, sickly, skeletal, starved, starveling, tabetic, tabid,
   tallow-faced, toneless, uncanny, uncolored, underfed,
   undernourished, unearthly, wan, washed-out, wasted, waxen, weak,
   weazeny, weird, whey-faced, white, withered, wizened, wraithlike