The Collaborative International Dictionary of English v.0.48:

Foumart \Fou"mart`\, n. [OE. folmard, fulmard; AS. f[=u]l foul +
   mear[eth], meard, marten: cf. F. marte, martre. See Foul,
   a., and Marten the quadruped.] (Zool.)
   The European polecat; -- called also European ferret, and
   fitchew. See Polecat. [Written also foulmart,
   foulimart, and fulimart.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Polecat \Pole"cat`\, n. [Probably fr. F. poule hen, and
   originally, a poultry cat, because it feeds on poultry. See
   Poultry.] (Zool.)
      (a) A small European carnivore of the Weasel family
          (Putorius f[oe]tidus). Its scent glands secrete a
          substance of an exceedingly disagreeable odor. Called
          also fitchet, foulmart, and European ferret.
      (b) The zorilla. The name is also applied to other allied
          species.
          [1913 Webster]

WordNet (r) 3.0 (2006):

foulmart
    n 1: dark brown mustelid of woodlands of Eurasia that gives off
         an unpleasant odor when threatened [syn: polecat,
         fitch, foulmart, foumart, Mustela putorius]