The Collaborative International Dictionary of English v.0.48:

Skunk \Skunk\, n. [Contr. from the Abenaki (American Indian)
   seganku.] (Zool.)
   Any one of several species of American musteline carnivores
   of the genus Mephitis and allied genera. They have two
   glands near the anus, secreting an extremely fetid liquid,
   which the animal ejects at pleasure as a means of defense.
   [1913 Webster]

   Note: The common species of the Eastern United States
         (Mephitis mephitica) is black with more or less white
         on the body and tail. The spotted skunk (Spilogale
         putorius), native of the Southwestern United States
         and Mexico, is smaller than the common skunk, and is
         variously marked with black and white.
         [1913 Webster]

   Skunk bird, Skunk blackbird (Zool.), the bobolink; -- so
      called because the male, in the breeding season, is black
      and white, like a skunk.

   Skunk cabbage (Bot.), an American aroid herb (Symplocarpus
      f[oe]tidus) having a reddish hornlike spathe in earliest
      spring, followed by a cluster of large cabbagelike leaves.
      It exhales a disagreeable odor. Also called swamp
      cabbage.

   Skunk porpoise. (Zool.) See under Porpoise.
      [1913 Webster]

WordNet (r) 3.0 (2006):

skunk cabbage
    n 1: deciduous perennial low-growing fetid swamp plant of
         eastern North America having minute flowers enclosed in a
         mottled greenish or purple cowl-shaped spathe [syn: skunk
         cabbage, polecat weed, foetid pothos, Symplocarpus
         foetidus]
    2: clump-forming deciduous perennial swamp plant of western
       North America similar to Symplocarpus foetidus but having a
       yellow spathe [syn: skunk cabbage, Lysichiton americanum]