calumnious

from WordNet (r) 3.0 (2006)

calumnious
    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

Calumnious \Ca*lum"ni*ous\, a. [L. calumniosus.]
   Containing or implying calumny; false, malicious, and
   injurious to reputation; slanderous; as, calumnious reports.
   [1913 Webster]

         Virtue itself 'scapes not calumnious strokes. --Shak.

   Syn: . Slanderous; defamatory; scurrilous; opprobrious;
        derogatory; libelous; abusive. -- {Ca*lum"ni*ous*ly},
        adv. -- {Ca*lum"ni*ous*ness}, n.
        [1913 Webster]