Detractor
Pronunciation : De*tract"or
Part of Speech : n.
Etymology : [L.: cf. F. d?tracteur.]
Definition : Defn: One who detracts; a derogator; a defamer. His detractors were noisy and scurrilous. Macaulay.
Syn. -- Slanderer; calumniator; defamer; vilifier.
Source : Webster's Unabridged Dictionary, 1913