The Collaborative International Dictionary of English v.0.48:

Polyporus \Po*lyp"o*rus\, n.; pl. Polypori. [NL., fr. Gr.
   poly`s many + ? a pore.] (Bot.)
   A genus of fungi having the under surface full of minute
   pores; also, any fungus of this genus.
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   Note: Polyporus fomentarius was formerly dried and cut in
         slices for tinder, called amadou. Polyporus betulinus
         is common in America, and forms very large thick white
         semicircular excrescences on birch trees. Several
         species of Polyporous are considered edible.
         [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Punk \Punk\, n. [Cf. Spunk.]
   1. Wood so decayed as to be dry, crumbly, and useful for
      tinder; touchwood.
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   2. A fungus (Polyporus fomentarius, etc.) sometimes dried
      for tinder; agaric.
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   3. An artificial tinder. See Amadou, and Spunk.
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   4. A prostitute; a strumpet. [Obsoles.] --Shak.
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