Wordnet 3.0
NOUN (1)
1. 
 any dog trained to hunt raccoons; 
The Collaborative International Dictionary of English v.0.48:
coondog \coon"dog`\ n.
   any dog trained to hunt raccoons.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
coondog
    n 1: any dog trained to hunt raccoons