The Collaborative International Dictionary of English v.0.48:

Dudgeon \Dudg"eon\, n.
   1. The root of the box tree, of which hafts for daggers were
      made. --Gerarde (1597).
      [1913 Webster]

   2. The haft of a dagger. --Shak.
      [1913 Webster]

   3. A dudgeon-hafted dagger; a dagger. --Hudibras.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dudgeon \Dudg"eon\, n. [W. dygen anger, grudge.]
   Resentment; ill will; anger; displeasure.
   [1913 Webster]

         I drink it to thee in dudgeon and hostility.
   [1913 Webster]

         Sir T. Scott.
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The Collaborative International Dictionary of English v.0.48:

Dudgeon \Dudg"eon\, a.
   Homely; rude; coarse. [Obs.]
   [1913 Webster]

         By my troth, though I am plain and dudgeon,
         I would not be an ass.                   --Beau. & Fl.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dudgeon
    n 1: a feeling of intense indignation (now used only in the
         phrase `in high dudgeon') [syn: dudgeon, high dudgeon]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "dudgeon":
   ferment, fret, fume, fury, high dudgeon, huff, humor, ire, miff,
   mood, pet, pique, rage, resentment, snuff, stew, temper, tiff,
   umbrage, wrath