invertebrate

invertebrate
    adj 1: lacking a backbone or spinal column; "worms are an
           example of invertebrate animals" [syn: {invertebrate},
           {spineless}] [ant: {vertebrate}]
    n 1: any animal lacking a backbone or notochord; the term is not
         used as a scientific classification
    

Invertebrate \In*ver"te*brate\, a. (Zool.)
   Destitute of a backbone; having no vertebr[ae]; of or
   pertaining to the Invertebrata. -- n. One of the
   Invertebrata.
   [1913 Webster]

   {Age of invertebrates}. See {Age}, and {Silurian}.
      [1913 Webster]
    

90 Moby Thesaurus words for "invertebrate":
      Milquetoast, abulic, afraid, amphibian, aquatic, baby, big baby,
      biped, canine, cannibal, carnivore, chicken, chicken liver,
      cosmopolite, coward, cowardly, crustacean, crustaceous, crybaby,
      disorganized, doormat, dull tool, emasculate, faint, fainthearted,
      feeble, feebleminded, feline, forceless, fraid-cat, fraidy-cat,
      frail, funk, funker, gnawer, gutless wonder, herbivore, impotent,
      inadequate, ineffective, ineffectual, infirm, insectivore,
      jellyfish, lightweight, lily liver, mammal, mammalian, marsupial,
      marsupialian, meek soul, milksop, molluscan, mollycoddle, mouse,
      namby-pamby, nebbish, nonentity, omnivore, pansy, pantywaist,
      pliable, primate, protozoan, protozoic, pushover, quadruped,
      reptile, rodent, ruminant, sad sack, scaredy-cat, scavenger, sissy,
      softling, softy, sop, spineless, ungulate, varmint, vermin,
      vertebrate, weak, weak sister, weak-kneed, weak-minded,
      weak-willed, weakling, white feather, white liver