The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Poultice \Poul"tice\, v. t. [imp. & p. p. Poulticed; p. pr. &
   vb. n. Poulticing.]
   To apply a poultice to; to dress with a poultice.
   [1913 Webster]

WordNet (r) 3.0 (2006):

poultice
    n 1: 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:
         poultice, cataplasm, plaster]
    v 1: dress by covering with a therapeutic substance [syn:
         poultice, plaster]