The Collaborative International Dictionary of English v.0.48:

Raccoon \Rac*coon"\ (r[a^]k*k[=oo]n"), n. [F. raton, prop., a
   little rat, fr. rat rat, perhaps of German origin. See
   Rat.] (Zool.)
   A North American nocturnal carnivore (Procyon lotor) allied
   to the bears, but much smaller, and having a long, full tail,
   banded with black and gray. Its body is gray, varied with
   black and white. Called also coon, and mapach.
   [1913 Webster]

   Raccoon dog (Zool.), the tanate.

   Raccoon fox (Zool.), the cacomixle.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coon \Coon\ (k[=oo]n), n. (Zool.)
   A raccoon. See Raccoon.
   [1913 Webster]

WordNet (r) 3.0 (2006):

coon
    n 1: an eccentric or undignified rustic; "I'll be a gone coon
         when the battle starts"
    2: (ethnic slur) extremely offensive name for a Black person;
       "only a Black can call another Black a nigga" [syn: nigger,
       nigga, spade, coon, jigaboo, nigra]
    3: North American raccoon [syn: common raccoon, common
       racoon, coon, ringtail, Procyon lotor]