LIBELOUS
calumniatory, calumnious, defamatory, denigrative, denigrating, denigratory, libellous, libelous, slanderous
(adjective) (used of statements) harmful and often untrue; tending to discredit or malign
Source: WordNet® 3.1
Etymology
Adjective
libelous (comparative more libelous, superlative most libelous)
(US) defamatory, libeling, referring to something that causes harm to someone's reputation especially with malice or disregard.
(US) meeting the legal standards for libel.
Synonyms
• See also defamatory
Source: Wiktionary
Li"bel*ous, a.
Definition: Containing or involving a libel; defamatory; containing that
which exposes some person to public hatred, contempt, or ridicule;
as, a libelous pamphlet. [Written also libellous.] -- Li"bel*ous*ly,
adv.
Source: Webster’s Unabridged Dictionary 1913 Edition