The Collaborative International Dictionary of English v.0.48:

Inflammatory \In*flam"ma*to*ry\, a. [Cf. F. inflammatoire.]
   1. Tending to inflame, kindle, or irritate.
      [1913 Webster]

   2. Tending to excite anger, animosity, tumult, or sedition;
      seditious; as, inflammatory libels, writings, speeches, or
      publications. --Burke.
      [1913 Webster]

   3. (Med.) Accompanied with, or tending to cause,
      preternatural heat and excitement of arterial action; as,
      an inflammatory disease.
      [1913 Webster]

   Inflammatory crust. (Med.) Same as Buffy coat, under
      Buffy.

   Inflammatory fever, a variety of fever due to inflammation.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inflammatory
    adj 1: characterized or caused by inflammation; "an inflammatory
           process"; "an inflammatory response"
    2: arousing to action or rebellion [syn: incendiary,
       incitive, inflammatory, instigative, rabble-rousing,
       seditious]

Moby Thesaurus II by Grady Ward, 1.0:

80 Moby Thesaurus words for "inflammatory":
   agitating, agitational, agitative, breathtaking, charged,
   cliff-hanging, disquieting, distracting, disturbing, electric,
   enkindling, exciting, exhilarating, explosive, fervent, fervid,
   fiery, fomenting, frantic, frenzied, galvanic, heady,
   heart-expanding, heart-stirring, heart-swelling, heart-thrilling,
   impressive, incendiary, incentive, inciting, incitive, inflaming,
   inflammative, instigating, instigative, insurgent, intoxicating,
   jarring, jolting, kindling, lighting, maddening, mind-blowing,
   moving, mutinous, overcoming, overmastering, overpowering,
   overwhelming, passionate, perturbing, piquant, provocative,
   provoking, rabble-rousing, rabid, ravishing, rebellious,
   revolutionary, riotous, rousing, seditionary, seditious,
   soul-stirring, spirit-stirring, stimulating, stimulative, stirring,
   striking, suspenseful, suspensive, tantalizing, telling, thrilling,
   thrilly, traitorous, treacherous, troubling, unsettling,
   upsetting