The Collaborative International Dictionary of English v.0.48:

Polemical \Po*lem"ic*al\, a.
   Polemic; controversial; disputatious. -- Po*lem"ic*al*ly,
   adv.
   [1913 Webster]

         Polemical and impertinent disputations.  --Jer. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

polemical
    adj 1: of or involving dispute or controversy [syn: polemic,
           polemical]

Moby Thesaurus II by Grady Ward, 1.0:

32 Moby Thesaurus words for "polemical":
   aggressive, argumental, argumentative, bellicose, belligerent,
   bickering, cat-and-dog, cat-and-doggish, combative, contentious,
   controversial, dialectic, disputatious, divisive, eristic,
   factional, factious, ill-humored, irascible, irritable, litigious,
   logomachic, partisan, pilpulistic, polarizing, polemic,
   pro and con, pugnacious, quarrelsome, scrappy, shrewish,
   wrangling