Source : Webster's Revised Unabridged Dictionary (1913)

Incendiary \In*cen"di*a*ry\, a. [L. incendiarius, fr. incendium
   a fire, conflagration: cf. F. incendiaire. See {Incense} to
   inflame.]
   1. Of or pertaining to incendiarism, or the malicious burning
      of valuable property; as, incendiary material; as
      incendiary crime.

   2. Tending to excite or inflame factions, sedition, or
      quarrel; inflammatory; seditious. --Paley.

   {Incendiary shell}, a bombshell. See {Carcass}, 4.