defamatory

from WordNet (r) 3.0 (2006)

defamatory
    adj 1: (used of statements) harmful and often untrue; tending to
           discredit or malign [syn: {calumniatory}, {calumnious},
           {defamatory}, {denigrative}, {denigrating},
           {denigratory}, {libellous}, {libelous}, {slanderous}]

from The Collaborative International Dictionary of English v.0.48

Defamatory \De*fam"a*to*ry\, a.
   Containing defamation; injurious to reputation; calumnious;
   slanderous; as, defamatory words; defamatory writings.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

32 Moby Thesaurus words for "defamatory":
      abusive, back-biting, backbiting, belittling, bitchy, calumniatory,
      calumnious, catty, censorious, contemptuous, contumelious,
      deprecatory, depreciative, depreciatory, derisive, derisory,
      derogative, derogatory, detracting, detractory, disparaging,
      libelous, maligning, minimizing, pejorative, ridiculing,
      scandalous, scurrile, scurrilous, slanderous, slighting,
      vilifying

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