Source : Webster's Revised Unabridged Dictionary (1913)

Poultice \Poul"tice\, n. [L. puls, pl. pultes, a thick pap; akin
   to Gr. po`ltos. Cf. {Pulse} seeds.]
   A soft composition, as of bread, bran, or a mucilaginous
   substance, to be applied to sores, inflamed parts of the
   body, etc.; a cataplasm. ``Poultice relaxeth the pores.''
   --Bacon.

Poultice \Poul"tice\, v. t. [imp. & p. p. {Poulticed}; p. pr. &
   vb. n. {Poulticing}.]
   To apply a poultice to; to dress with a poultice.

Source : WordNet®

poultice
     n : a medical dressing consisting of a soft heated mass of meal
         or clay that is spread on a cloth and applied to the skin
         to treat inflamed areas or improve circulation etc. [syn:
          {cataplasm}, {plaster}]
     v : dress by covering with a therapeutic substance [syn: {plaster}]